User terminal

ABSTRACT

A user terminal according to one aspect of the present disclosure includes: a control section that determines transmit power in a transmission occasion in a period of uplink transmission over a plurality of slots, the transmission occasion being a period of a whole of the uplink transmission or a period of transmission in one slot in the uplink transmission; and a transmitting section that uses the transmit power in the transmission occasion.

TECHNICAL FIELD

The present disclosure relates to a user terminal in next-generationmobile communication systems.

BACKGROUND ART

In Universal Mobile Telecommunications System (UMTS) network, thespecifications of Long-Term Evolution (LTE) have been drafted for thepurpose of further increasing high speed data rates, providing lowerlatency and so on (see Non-Patent Literature 1). In addition, for thepurpose of further high capacity, advancement and the like of the LTE(Third Generation Partnership Project (3GPP) Release (Rel.) 8 and Rel.9), the specifications of LTE-Advanced (3GPP Rel. 10 to Rel. 14) havebeen drafted.

Successor systems of LTE (e.g., referred to as “5th generation mobilecommunication system (5G)),” “5G+ (plus),” “New Radio (NR),” “3GPP Rel.15 (or later versions),” and so on) are also under study.

In existing LTE systems (for example, 3GPP Rel. 8 to Rel. 14), a userterminal (User Equipment (UE)) controls transmission of an uplink sharedchannel (for example, a Physical Uplink Shared Channel (PUSCH)) andreception of a downlink shared channel (for example, a Physical DownlinkControl Channel (PDSCH)), based on downlink control information (DCI).

CITATION LIST Non-Patent Literature

Non-Patent Literature 1: 3GPP TS 36.300 V8.12.0 “Evolved UniversalTerrestrial Radio Access (E-UTRA) and Evolved Universal TerrsestrialRadio Access Network (E-UTRAN); Overall description; Stage 2 (Release8),” April, 2010

SUMMARY OF INVENTION Technical Problem

In Rel. 15, the following has been under study: the user terminal (UserEquipment (UE)) allocates a time domain resource (for example, a givennumber of symbols) in a single slot for at least one of a given channeland signal (channel/signal) (for example, an uplink shared channel(Physical Uplink Shared Channel (PUSCH)) or a downlink shared channel(Physical Downlink Shared Channel (PDSCH))) of a given transmissionoccasion (also referred to as a period, an occasion, or the like).

On the other hand, in future radio communication systems (for example,Rel. 16 or a later version, hereinafter also referred to as NR), it isalso assumed that a time domain resource (for example, a given number ofsymbols) is allocated across a slot boundary (over a plurality of slots)for a given channel/signal (for example, the PUSCH or the PDSCH) of agiven transmission occasion.

Transmission of the channel/signal using the time domain resourceallocated across the slot boundary (over a plurality of slots) in agiven transmission occasion is also referred to as multi-segmenttransmission, two-segment transmission, cross slot boundarytransmission, or the like. In a similar manner, reception of thechannel/signal across the slot boundary is also referred to asmulti-segment reception, two-segment reception, cross slot boundaryreception, or the like.

However, in Rel. 15, control (for example, at least one of determinationof the time domain resource, repeated transmission or repeatedreception, and frequency hopping) related to at least one oftransmission and reception (transmission/reception) of thesignal/channel on the presupposition that the time domain resource isallocated without crossing the slot boundary (within a single slot) inthe given transmission occasion is performed. Thus, in NR, the controlrelated to the transmission/reception of the signal/channel to betransmitted by the multi-segment transmission may not be appropriatelyperformed.

In the light of the above, the present disclosure has one object toprovide a user terminal that can appropriately controltransmission/reception of a signal/channel to be transmitted bymulti-segment transmission.

Solution to Problem

A user terminal according to one aspect of the present disclosureincludes: a control section that determines transmit power in atransmission occasion in a period of uplink transmission over aplurality of slots, the transmission occasion being a period of a wholeof the uplink transmission or a period of transmission in one slot inthe uplink transmission; and a transmitting section that uses thetransmit power in the transmission occasion.

Advantageous Effects of Invention

According to one aspect of the present disclosure, thetransmission/reception of the signal/channel to be transmitted by themulti-segment transmission can be appropriately controlled.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram to show an example of multi-segment transmission;

FIGS. 2A and 2B are each a diagram to show an example of allocation of atime domain resource to a PUSCH;

FIGS. 3A and 3B are each a diagram to show an example of frequencyhopping;

FIG. 4 is a diagram to show an example of determination of the timedomain resource according to a first aspect;

FIG. 5 is a diagram to show an example of first time domain resourcedetermination according to the first aspect;

FIGS. 6A and 6B are each a diagram to show an example of second timedomain resource determination according to the first aspect;

FIGS. 7A and 7B are each a diagram to show an example of first andsecond repeated transmission according to a second aspect;

FIG. 8 is a diagram to show an example of a first frequency hoppingprocedure according to a third aspect;

FIG. 9 is a diagram to show another example of the first frequencyhopping procedure according to the third aspect;

FIG. 10 is a diagram to show an example of a second frequency hoppingprocedure according to the third aspect;

FIGS. 11A and 11B are each a diagram to show an example of firstfrequency hopping boundary determination according to a fourth aspect;

FIGS. 12A and 12B are each a diagram to show an example of secondfrequency hopping boundary determination according to the fourth aspect;

FIG. 13 is a diagram to show an example of transmission occasion type 1;

FIG. 14 is a diagram to show an example of transmission occasion type 2;

FIG. 15 is a diagram to show an example of a schematic structure of aradio communication system according to one embodiment;

FIG. 16 is a diagram to show an example of a structure of a base stationaccording to one embodiment;

FIG. 17 is a diagram to show an example of a structure of a userterminal according to one embodiment; and

FIG. 18 is a diagram to show an example of a hardware structure of thebase station and the user terminal according to one embodiment.

DESCRIPTION OF EMBODIMENTS (Multi-Segment Transmission)

In Rel. 15, the following has been under study: the user terminal (UserEquipment (UE)) allocates a time domain resource (for example, a givennumber of symbols) in a single slot for at least one of a given channeland signal (channel/signal) (for example, an uplink shared channel(Physical Uplink Shared Channel (PUSCH)) or a downlink shared channel(Physical Downlink Shared Channel (PDSCH))) of a given transmissionoccasion (also referred to as a period, an occasion, or the like).

For example, in a given transmission occasion, the UE may transmit oneor a plurality of transport blocks (TBs) by using the PUSCH allocated toa given number of consecutive symbols in a slot. In a given transmissionoccasion, the UE may transmit one or a plurality of TBs by using thePDSCH allocated to a given number of consecutive symbols in a slot.

On the other hand, in NR (for example, Rel. 16 or a later version), itis also assumed that a time domain resource (for example, a given numberof symbols) is allocated across a slot boundary (over a plurality ofslots) for a given channel/signal (for example, the PUSCH or the PDSCH)of a given transmission occasion.

Transmission of the channel/signal using the time domain resourceallocated across the slot boundary (over a plurality of slots) in agiven transmission occasion is also referred to as multi-segmenttransmission, two-segment transmission, cross slot boundarytransmission, or the like. In a similar manner, reception of thechannel/signal across the slot boundary is also referred to asmulti-segment reception, two-segment reception, cross slot boundaryreception, or the like.

FIG. 1 is a diagram to show an example of the multi-segmenttransmission. Note that FIG. 1 shows an example of the multi-segmenttransmission of the PUSCH. However, it goes without saying that thepresent invention can also be applied to other signals/channels (forexample, the PDSCH and the like).

In FIG. 1, the UE may control transmission of the PUSCH allocated in oneslot or across a plurality of slots, based on a given number ofsegments. Specifically, when the time domain resource over one or moreslots is allocated to the PUSCH in a given transmission occasion, the UEmay map each segment to a given number of allocation symbols in acorresponding slot.

Here, “segment” refers to a given data unit, and only needs to be atleast a part of one or a plurality of TBs. For example, each segment mayinclude one or a plurality of TBs, one or a plurality of code blocks(CBs), or one or a plurality of code block groups (CBGs). Note that oneCB is a unit for coding of the TB, and may be obtained by segmenting theTB into one or a plurality of portions (CB segmentation). One CBG mayinclude a given number of CBs.

The size (number of bits) of each segment may be, for example,determined based on at least one of the number of slots to which thePUSCH is allocated, the number of allocation symbols in each slot, and aratio of the number of allocation symbols in each slot. The number ofsegments only needs to be determined based on the number of slots towhich the PUSCH is allocated.

Alternatively, “segment” may be a given number of symbols in each slotallocated in one transmission occasion, or data transmitted by using thegiven number of symbols. For example, when the start symbol of the PUSCHallocated in one transmission occasion is present in the first slot andthe end symbol is present in the second slot, with respect to the PUSCH,one or more symbols included in the first slot may be the first segmentand one or more symbols included in the second slot may be the secondsegment.

For example, each of PUSCHs #0 and #4 is allocated to a given number ofconsecutive symbols in a single slot. In this case, the UE may map asingle segment to the allocation symbols in the single slot. The singlesegment only needs to include, for example, one or a plurality of TBs.Transmission of the single segment in the single slot as described abovemay be referred to as single-segment transmission, one-segmenttransmission, or the like.

On the other hand, each of PUSCHs #1, #2, and #3 is allocated to a givennumber of consecutive symbols mapped over a plurality of slots (here,two slots) across the slot boundary. In this case, the UE may map aplurality of segments (for example, two segments) to the allocationsymbols in a plurality of slots different from each other. Each segmentonly needs to include, for example, a data unit obtained by segmentingone or a plurality of TBs, such as one TB, a given number of CBs, or agiven number of CBGs.

Transmission of the plurality of segments mapped over the plurality ofslots as described above may be referred to as multi-segmenttransmission, two-segment transmission, cross slot boundarytransmission, or the like. Note that one segment may correspond to eachslot, or a plurality of segments may correspond to each slot.

(Time Domain Resource Allocation)

For NR, the following has been under study: the UE determines the timedomain resource (for example, one or more symbols) allocated to thePUSCH or the PDSCH, based on a value of a given field (for example, atime domain resource allocation (Time Domain Resource Assignment orallocation (TDRA)) field) in downlink control information (DCI).

For example, the following has been under study: the UE determines astart symbol S and the number (time length or length) L of symbols ofthe PUSCH in a slot, based on the value of the TDRA field in the DCI(for example, DCI format 0_0 or 0_1).

FIGS. 2A and 2B are each a diagram to show an example of allocation ofthe time domain resource to the PUSCH. As shown in FIG. 2A, the timedomain resource allocated to the PUSCH may be determined based on thestart symbol S relative to the start of a slot (starting symbol Srelative to the start of the slot) and the number L of consecutivesymbols. Note that the start symbol S may be alternatively referred toas an index S or a position S of the start symbol, for example.

For example, the UE may determine a row index (an entry number or anentry index) (for example, m+1) of a given table, based on a value m ofthe TDRA field in the DCI. The row index may indicate (may define, ormay be associated with) a parameter (PUSCH time domain allocationparameter) related to allocation of the time domain resource to thePUSCH.

The PUSCH time domain allocation parameter may include, for example, atleast one parameter of the following:

Information (offset information, K2 information) indicating a timeoffset K2 (also referred to as k2, K₂, or the like) between DCI and thePUSCH scheduled by using the DCI

Information (mapping type information) indicating a mapping type of thePUSCH, and an identifier (Start and Length Indicator (SLIV)) indicatinga combination of the start symbol S and the number L of symbols (or thestart symbol S and the number L of symbols themselves)

The PUSCH time domain allocation parameter corresponding to each rowindex may be given by a given list (for example,“pusch-TimeDomainAllocationList” or“PUSCH-TimeDomainResourceAllocationList”of information elements (IEs) ofradio resource control (RRC)) configured by a higher layer, or may bedefined in a specification in advance.

For example, when the UE detects the DCI for scheduling the PUSCH inslot #n, the UE may determine a slot for transmitting the PUSCH, basedon the K2 information indicated by the row index (for example, m+1)given by the TDRA field value m in the DCI.

The UE may determine the start symbol S and the number L of symbolsallocated to the PUSCH in the determined slot, based on the SLIVindicated by the row index (for example, m+1) given by the TDRA fieldvalue m in the DCI.

Specifically, the UE may derive the start symbol S and the number L ofsymbols from the SLIV, based on a given rule. For example, the givenrule may be the following Expression 1 if (L−1) is equal to or less than7, and may be the following Expression 2 if (L−1) is greater than 7.

If (L−1)≤7,

SLIV=14·(L−1)+S  (Expression 1)

If (L−1)>7,

SLIV=14·(L−1)+(14−1−S)  (Expression 2)

Alternatively, the UE may determine the start symbol S and the number Lof symbols allocated to the PUSCH in the determined slot, based on thestart symbol S and the number V of symbols directly indicated by the rowindex (for example, m+1) given by the TDRA field value m in the DCI.

The UE may determine the mapping type of the PUSCH, based on the mappingtype information indicated by the row index (for example, m+1) given bythe TDPA field value m in the DCI.

FIG. 2B shows an example of the start symbol S and the number L ofsymbols recognized by the UE as an enabled allocation of the PUSCH. Asshown in FIG. 1B, values of the start symbol S and the number L ofsymbols recognized as a valid allocation of the PUSCH may be indicatedfor each of at least one of the mapping type of the PUSCH and a cyclicprefix (CP) length.

As shown in FIG. 2B, in NR of Rel. 15 or earlier versions, a maximumvalue of the start symbol S and the number L of symbols is 14. This isbecause the multi-segment transmission described above is not assumed;specifically, allocation of the PUSCH in one slot is assumed, and S=0 isfixed to the start symbol (symbol #0) of the slot.

Note that the description above illustrates a case in which the SLIV isindicated by the TDPA field value in the DCI (for example, a case inwhich the PUSCH is scheduled by using the DCI (a UL grant, a dynamicgrant), or a case of a type 2 configuration grant). However, the presentinvention is not limited to these cases. The SLIV may be configured byusing a higher layer parameter (for example, in a case of a type 1configuration grant).

The description above illustrates the allocation of the time domainresource to the PUSCH. However, allocation of the time domain resourceto the PDSCH may be performed in a similar manner as well. Theallocation of the time domain resource to the PDSCH can be applied byreplacing the PUSCH in the above description with the PDSCH.

In a case of the PDSCH, the K2 information only needs to be replacedwith information (also referred to as offset information, K0information, or the like) indicating an offset K0 (also referred to ask0, K₀, or the like) between DCI and the PDSCH scheduled by using theDCI. Note that, to derive the start symbol S and the number L of symbolsof the PDSCH, an expression the same as Expression (1) or (2) shownabove may be used, or a different expression may be used. In the case ofthe PDSCH, the DCI may be, for example, DCI format 1_0 or 1_1.

(Repeated Transmission)

For NR, transmission of the PUSCH or the PDSCH with repetition has beenunder study. Specifically, in NR, transmission of the TB based on thesame data in one or more transmission occasions has been under study.Each of the transmission occasions falls within one slot, and the TB maybe transmitted N times in N consecutive slots. In this case, the terms“transmission occasion”, “slot”, and “repetition” can be interchangeablyused.

The repeated transmission may be referred to as slot-aggregationtransmission, multi-slot transmission, or the like. The number N oftimes of repetition (number of aggregations, aggregation factor) may bespecified for the UE by using at least one of the higher layer parameter(for example, “pusch-AggregationFactor” or “pdsch-AggregationFactor” ofthe RRC IEs) and the DCI.

The same symbol allocation may be applied among the N consecutive slots.The same symbol allocation among slots may be determined as described inthe time domain resource allocation. For example, the UE may determinethe symbol allocation in each slot, based on the start symbol S and thenumber L of symbols that is determined based on the value m of the givenfield (for example, the TDRA field) in the DCI. Note that the UE maydetermine the start slot, based on the K2 information that is determinedbased on the value m of the given field (for example, the TDRA field) inthe DCI.

On the other hand, among the N consecutive slots, a redundancy version(RV) applied to the TB based on the same data may be the same, or atleast a part of the RV may be different. For example, the RV applied tothe TB in the n-th slot (transmission occasion, repetition) may bedetermined based on a value of a given field (for example, an RV field)in the DCI.

When the resource allocated to the N consecutive slots has acommunication direction different from the UL, the DL, or the flexibleof each slot specified by using at least one of uplink and downlinkcommunication direction indication information (for example,“TDD-UL-DL-ConfigCommon” or “TDD-UL-DL-ConfigDedicated” of the RRC IEs)for TDD control and a slot format indicator of the DCI (for example, DCIformat 2_0) in at least one symbol, the resource of the slot includingthe symbol may not be transmitted (or may not be received).

(Frequency Hopping)

In NR, frequency hopping (FH) may be applied to the signal/channel. Willbe described. For example, inter-slot frequency hopping or intra-slotfrequency hopping may be applied to the PUSCH.

The intra-slot frequency hopping may be applied to both of the PUSCHthat is transmitted with repetition and the PUSCH that is transmittedwithout repetition (a single time). The inter-slot frequency hopping maybe applied to the PUSCH that is transmitted with repetition.

A frequency offset (also simply referred to as an offset) betweenfrequency hops (also simply referred to as hops) (for example, between afirst hop and a second hop) may be determined based on at least one ofthe higher layer parameter and a given field value in the DCI. Forexample, a plurality of offsets (for example, two or four offsets) maybe configured for a grant (dynamic grant) on the DCI or a configurationgrant (type 2 configuration grant) whose activation is controlled by theDCI, by using the higher layer parameter, and one of the plurality ofoffsets may be specified by using the given field value in the DCI.

FIGS. 3A and 3B are each a diagram to show an example of the frequencyhopping. As shown in FIG. 3A, the inter-slot frequency hopping isapplied to the repeated transmission, and the frequency hopping may becontrolled for each slot. A start RB of each hop may be determined basedon at least one of an index RB_(start) of the start RB of a frequencydomain resource allocated to the PUSCH, an offset RB_(offset) given byat least one of the higher layer parameter and the given field value inthe DCI, and the size (number of RBs) N_(BWP) in a given band (forexample, a BWP).

For example, as shown in FIG. 3A, the index of the start RB of the slotwhose slot number is an even number may be RB_(start), and the index ofthe start RB of the slot whose slot number is an odd number may becalculated by using RB_(start), RB_(offset), and N_(BWP) (for example,according to the following Expression (3)).

(RB _(start) +RB _(offset))mod N _(BWP)  Expression (3)

The UE may determine the frequency domain resource (for example, aresource block or a physical resource block (PRB)) allocated to eachslot (repetition, transmission occasion) that is determined based on avalue of a given field (for example, a frequency domain resourceallocation (FDRA) field) in the DCI. The UE may determine RB_(start),based on the value of the FDRA field.

Note that, when the inter-slot frequency hopping is applied as shown inFIG. 3A, the frequency hopping need not be applied in the slot.

As shown in FIG. 3B, the intra-slot frequency hopping may be applied tothe transmission without repetition. Alternatively, although not shown,the intra-slot frequency hopping may be applied in each slot(transmission occasion) of the repeated transmission. The start RB ofeach hop in FIG. 3B may be determined in a manner similar to that of theinter-slot frequency hopping described with reference to FIG. 3A.

In the intra-slot frequency hopping of FIG. 3B, the number of symbols ofeach hop (a boundary of each hop or a frequency hopping boundary) may bedetermined based on the number N_(symb) of symbols allocated to thePUSCH of a given transmission occasion.

The time domain resource allocation, the repeated transmission, and thefrequency hopping described above are designed on the premise that thetime domain resource allocated to the signal/channel in a giventransmission occasion falls within a single slot (does not cross theslot boundary).

On the other hand, as described above, in NR (for example, Rel. 16 or alater version), introduction of the multi-segment transmission wherebythe time domain resource is allocated over a plurality of slots (acrossthe slot boundary) in a given transmission occasion has been understudy. Thus, how to control the multi-segment transmission poses aproblem.

(Transmission Power Control)

In Rel. 15, the UE performs transmission power control (TPC) for eachtransmission occasion i. The transmission occasion i may be atransmission occasion of the PUSCH, the PUCCH, the SRS, or the PRACH.The transmission occasion i may be defined by a slot index n_(s,f) ^(μ)with respect to a subcarrier spacing configuration P in a frame having asystem frame number (SFN), the first symbol (index of the first symbolin the transmission occasion i) S in the slot, and the number L ofconsecutive symbols.

The transmit power of the PUSCH is controlled based on a TPC command(also referred to as a value, an increased/decreased value, a correctionvalue, or the like) indicated by a value of a given field (also referredto as a TPC command field, a first field, or the like) in the DCI.

For example, when the UE transmits the PUSCH in a BWP b of a carrier fof a cell c by using a parameter set (open loop parameter set) having anindex j and an index l of a power control adjustment state, transmitpower (P_(PUSCH, b,f,c)(i, j, q_(d), l)) of the PUSCH in the PUSCHtransmission occasion (also referred to as a transmission period or thelike) i may be expressed as in the following Expression (4).

Here, in the power control adjustment state, whether a plurality ofstates (for example, two states) are included or a single state isincluded may be configured by using the higher layer parameter. When aplurality of power control adjustment states are configured, one of theplurality of power control adjustment states may be identified by theindex l (for example, l∈{0, 1}). The power control adjustment state maybe referred to as a PUSCH power control adjustment state, a first orsecond state, or the like.

The transmission occasion i of the PUSCH refers to a given period inwhich the PUSCH is transmitted, and may include, for example, one ormore symbols, one or more slots, or the like.

     [Math.  1]                                     Expression  (4)${\text{?}\left( {i,j,q_{d},l} \right)} = {\min\left\{ {\begin{matrix}{{P_{{CMAX},f,c}(i)},} \\\left. \begin{matrix}{{P_{{O\_ PUSCH},b,f,c}(j)} + {10\;{\log_{10}\left( {{2^{\mu} \cdot \text{?}}(i)} \right)}} +} \\{{{\alpha_{{b,f,c}\;}(j)} \cdot {{PL}_{b,f,c}\left( \text{?} \right)}} + {\Delta_{{TF},b,f,c}(i)} + {f_{b,f,c}\left( {i,l} \right)}}\end{matrix} \right\}\end{matrix}\text{?}\text{indicates text missing or illegible when filed}} \right.}$

In Expression (4), P_(CMAX,f,c(i)) represents, for example, transmitpower (also referred to as maximum transmit power or the like) of theuser terminal that is configured for the carrier f of the cell c in thetransmission occasion i. P_(O_PUSCH,b,f,c)(j) represents, for example, aparameter related to target received power that is configured for theBWP b of the carrier f of the cell c in the transmission occasion i(also referred to as, for example, a parameter related to a transmitpower offset, a transmit power offset P0, a target received powerparameter, or the like).

M^(PUSCH) _(RB,b,f,c)(i) represents, for example, the number of resourceblocks (bandwidth) that is allocated to the PUSCH for the transmissionoccasion i in the uplink BWP b of the cell c and the carrier f of thesubcarrier spacing ρ. α_(b,f,c)(j) represents a value that is providedby the higher layer parameter (also referred to as, for example,msg3-Alpha, p0-PUSCH-Alpha, a fractional factor, or the like).

PL_(b,f,c)(q_(d)) represents, for example, a pathloss (pathlosscompensation) that is calculated in the user terminal by using an indexq_(d) of the reference signal for the downlink BWP associated with theuplink BWP b of the carrier f of the cell c.

Δ_(TF,b,f,c)(i) represents a transmission power adjustment component(offset, transmission format compensation) for the uplink BWP b of thecarrier f of the cell c.

f_(b,f,c)(i, l) is a value based on the TPC command of the power controladjustment state index l of the uplink BWP of the cell c and the carrierf of the transmission occasion i (for example, an accumulated value ofthe TPC command, or a value obtained with a closed loop). For example,the accumulated value of the TPC command may be expressed as inExpression (5).

[Math. 2]

f _(b,f,c)(i,l)=f _(b,f,c)(i _(last) ,l)+δ_(PUSCH,b,f,c)(i _(last) ,i,K_(PUSCH) ,l)  Expression (5)

In Expression (5), δ_(PUSCH,b,f,c)(i_(last), i, K_(PUSCH), l) mayrepresent, for example, the TPC command indicated by a TPC command fieldvalue in the DCI (for example, DCI format 0_0 or 0_1) that is detectedin the uplink BWP b of the carrier f of the cell c for the transmissionoccasion i after an immediately preceding transmission occasion i_(last)of the PUSCH, or may be the TPC command indicated by a TPC command fieldvalue of the DCI (for example, DCI format 2_2) that has CRC parity bitsto be scrambled (to be CRC-scrambled) with a specific RNTI (RadioNetwork Temporary Identifier) (for example, a TPC-PUSCH-RNTI).

Note that Expressions (4) and (5) are merely an example, and expressionsare not limited to those expressions. It is only necessary that the userterminal controls the transmit power of the PUSCH, based on at least oneof the parameters shown in the examples of Expressions (4) and (5), andan additional parameter may be included, or a part of the parameters maybe omitted. In Expressions (4) and (5) shown above, the transmit powerof the PUSCH is controlled for each BWP of a given carrier of a givencell. However, the present invention is not limited to this. At least apart of the cell, the carrier, the BWP, the power control adjustmentstate may be omitted.

In the transmission power control according to Rel. 15 as describedabove, the transmission occasion i is restricted within one slot, andthus cannot be applied to the multi-segment transmission.

In the light of above, the inventors of the present invention came upwith the idea of a transmission power control method for themulti-segment transmission.

Embodiments according to the present disclosure will be described indetail with reference to the drawings as follows. Note that the first tofifth aspects described below may be used individually, or may be usedin combination of at least two of the aspects.

(First Aspect)

In the first aspect, determination of the time domain resource that canalso be applied to the multi-segment transmission will be described. Asdescribed above, in Rel. 15, it is premised that the time domainresource allocated to the PUSCH or the PDSCH in a given transmissionoccasion falls within a single slot (does not cross the slot boundary),and the start symbol S and the number L of symbols are determined withthe start of the slot being used as a reference. Thus, the UE may beunable to appropriately determine the allocated time domain resource ofthe PUSCH or the PDSCH over one or more slots (across the slot boundary)in the given transmission occasion.

In the light of above, in the first aspect, timing being used as areference of the start symbol of the PUSCH or the PDSCH in the giventransmission occasion is reported (first time domain resourcedetermination). Alternatively, an index is assigned to each unitincluding a plurality of symbols in a plurality of consecutive slots(first time domain resource determination). With this configuration, thetime domain resource allocated over one or more slots (across the slotboundary) in the given transmission occasion can be appropriatelydetermined.

In the first aspect described below, the PUSCH will be mainly described.However, the present invention can be applied to other channels (forexample, the PUDSCH) as well as appropriate. In the description below,the dynamic grant-based PUSCH will be described. However, the presentinvention can be applied to the PUSCH based on the configuration grantof type 2 or the configuration grant of type 1 as well as appropriate.

<First Time Domain Resource Determination>

In a first time domain resource determination, the UE may receiveinformation related to timing being used as a reference of the startsymbol of the PUSCH (also referred to as reference timing, referencestart timing, symbol timing, start symbol timing, or the like).

The information related to the reference timing may be, for example,information indicating a value (reference timing value) S′ indicatingthe reference timing. The reference timing value S′ may be, for example,an offset value with respect to the start of the slot, the number ofsymbols from the start of the slot, or the like.

The reference timing value S′ may be specified by using at least one ofthe higher layer parameter and a value of a given field in the DCI (forexample, the DCI for scheduling the PUSCH). The given field may beanother given field (also referred to as a reference timing field or thelike) that is different from the TDRA field used for determination ofthe SLIV. The value of the given field may indicate one of one or morecandidate values of the reference timing value S′. The candidate valuemay be defined in a specification in advance, or may be configured byusing the higher layer parameter (for example, the RRC IE).

The UE may determine the reference timing value S′, based on at leastone of the higher layer parameter and the given field value in the DCI.The UE may determine the time domain resource allocated to the PUSCH,based on the reference timing value S′ and the SLIV (or the start symbolS and the number L of symbols).

For example, the UE may determine the time domain resource allocated tothe PUSCH, based on the SLIV (or the start symbol S and the number L ofsymbols), by using the symbol in which the reference timing value S′ isgiven to the start of the slot as a reference instead of using the startof the slot as a reference.

As described above, the UE may determine the SLIV, based on the value mof the TDRA field in the DCI for scheduling the PUSCH. Specifically, theUE may determine the SLIV (or the start symbol S and the symbol L) thatis indicated by the row index determined by the value m of the TDRAfield in a given table. The UE may derive the start symbol S and thenumber of symbols, based on the SLIV.

Note that the UE may determine the reference timing value S′, based onthe value m of the TDRA field. Specifically, the UE may determine thereference timing value S′ that is indicated by the row index determinedby the value m of the TDRA field in a given table. In this case, thePUSCH time domain allocation parameter may include the reference timingvalue S′. With this configuration, the reference timing value S′ can bespecified without adding a new field in the DCI.

The UE may determine the symbols of the number L of consecutive symbolsfrom the start symbol S relative to the symbol that is indicated by thereference timing value S′ determined as described above as the timedomain resource allocated to the PUSCH.

FIG. 4 is a diagram to show an example of determination of the timedomain resource according to the first aspect. For example, in FIG. 4,for the UE, start symbol S=0 is determined, based on the SLIV that isdetermined based on the TDRA field value m in the DCI. The referencetiming value S′ is determined based on a given field value in the DCI.

In a given slot (for example, a slot determined based on the K2information), the UE may determine the number L of consecutive symbols(in other words, symbol #S′+S to symbol #S′+S+L) from symbol #S′+S,which is later than symbol #S′ by the start symbol S, as the time domainresource allocated to the PUSCH.

In this manner, the start symbol S may be an offset value (also referredto as a value indicating a relative start symbol, a value indicatingrelative start timing, a value indicating a relative start position, orthe like) with respect to the reference timing (for example, the symbolassigned with the index S′ (symbol #S′)) determined by the referencetiming value S′.

FIG. 5 is a diagram to show an example of the first time domain resourcedetermination according to the first aspect. For example, FIG. 5 showsan example in which candidate values of the reference timing value S′are 0, 3, 7, and 10. Note that the candidate values are merely anexample, and the number, the value, and the like of the candidate valuesare not limited to those shown in the figure.

FIG. 5 shows an example in which the start symbol S determined based onthe TDRA field value m in the DCI is 0, and the number L of symbols is14. However, the start symbol S and the number L of symbols are notlimited to those. The UE determines the K2 information, based on theTDRA field value m, and determines L consecutive symbols from symbol#S′+S of the slot determined based on the K2 information as the timedomain resource allocated to the PUSCH.

As shown in FIG. 5, when the reference timing value S′ is greater than 0(3, 7, and 10 in FIG. 4), the PUSCH is allocated to the consecutivesymbols in a plurality of slots across the slot boundary. The UE maysegment the PUSCH (one or a plurality of TBs) so as to correspond to theplurality of respective slots and transmit the segmented PUSCH.

In this manner, by reporting the reference offset value S′ to the UE,the time domain resource allocated to the PUSCH can be determined on thesymbol basis, based on the TDRA field value m in the DCI. In this case,the time domain resource can be allocated on the symbol basis in both ofthe single segment transmission (for example, S′=0 in FIG. 5) and themulti-segment transmission (for example, S′=3, 7, or 10 in FIG. 5).

Note that the size (number of bits) of the given field indicating thereference timing value S′ in the DCI may be defined in a specificationin advance, or may be determined based on the number X_(S′) of candidatevalues of the reference timing value S′ configured by using the higherlayer parameter (for example, the RRC IE). For example, the size of thegiven field may be determined according to ceil{log 2(X_(S′))}.

The DCI including the given field indicating the reference timing valueS′ is DCI used for scheduling of the PUSCH, and may be, for example, DCIformat 0_0 or 0_1 or a DCI format different from these. Such a differentDCI format may be, for example, a DCI format for scheduling the PUSCH ofa type of specific traffic (for example, Ultra Reliable and Low LatencyCommunications (URLLC)).

The UE may determine whether or not the given field indicating thereference timing value S′ is included in the DCI, based on at least oneof the following (1) to (4).

(1) Radio network temporary identifier (RNTI) used for scramble (CRCscramble) of redundancy check (Cyclic Redundancy Check) bits of the DCI(2) Size of the DCI format(3) Configuration of a search space in which the DCI is monitored](4) Frequency band (for example, a component carrier (CC) (also referredto as a cell, a serving cell, a carrier, or the like) or a bandwidthpart (BWP)) in which the DCI is detected

When the PUSCH is scheduled by using DCI format 0_0, the UE may assumeor expect that the given field indicating the reference timing value S′is not included in the DCI format 0_0, or may assume or expect that thevalue of S′ is 0. The UE may assume that the PUSCH is allocated in oneslot (without crossing the slot boundary) in the given transmissionoccasion.

In the first time domain resource determination, by reporting thereference offset value S′ to the UE, the time domain resource of thePUSCH for the multi-segment transmission can be appropriately determinedby reusing the method of determining the time domain resource accordingto the existing SLIV (or the start symbol S and the number L ofsymbols).

<Second Time Domain Resource Determination>

In a second time domain resource determination, the time domain resourcefor the PUSCH may be allocated based on a time unit different from thesymbols (for example, a time unit including a plurality of consecutivesymbols).

In the second time domain resource determination, the allocation of thetime domain resource across the slot boundary (in other words, themulti-segment transmission) may be implemented by allocating the timedomain resource for the PUSCH on a time unit basis, the time unitincluding a plurality of consecutive symbols.

Specifically, an index (also referred to as a unit index, a time unitindex, or the like) may be assigned to each time unit included in aplurality of consecutive slots. For example, 14 time units may beincluded in the plurality of slots, and unit indexes #0 to #13 may beassigned to the 14 time units in ascending order in the time direction.

The number of symbols constituting each time unit may be determinedbased on how many symbol boundaries are crossed in allocation of thePUSCH (in other words, the number of slots to which a single PUSCH (onerepetition) is allocated). For example, when the PUSCH is allocatedacross one symbol boundary over two slots, each time unit may includetwo consecutive symbols. The number of symbols constituting each timeunit need not be the same, and for example, time units of 3 and 4symbols may coexist in the plurality of consecutive slots.

The number of symbols constituting each time unit (also referred to as aunit pattern, a unit configuration, or the like) may be defined in aspecification in advance, or may be configured by using the higher layerparameter.

For the UE, the SLIV determined based on the TDRA field value m in theDCI may be used as an identifier that indicates a combination of thefirst time unit (start unit) S allocated to the PUSCH and the number Lof consecutive time units from the time unit S, instead of indicating acombination of the start symbol S and the number L of symbols.

Specifically, the UE may determine the SLIV (or S and L) that isindicated by the row index determined by the TDRA field value m in theDCI in a given table. The UE may derive the start unit S and the numberL of units, based on the SLIV. Alternatively, the UE may determine thestart unit S and the number L of units that are indicated by the rowindex determined by the TDRA field value m in the DCI in a given table.

FIGS. 6A and 6B are each a diagram to show an example of the second timedomain resource determination according to the first aspect. Forexample, in FIGS. 6A and 6B, S=3 and L=7 are derived from the SLIV thatis determined based on the TDRA field value m in the DCI. However, thevalues of S and L are not limited to those in the figures.

As shown in FIG. 6A, in a case of the symbol basis, L consecutivesymbols (L=7) from start symbol #S (here, S=3) are allocated to thePUSCH. On the other hand, as shown in FIG. 5B, on the basis of the timeunit, L consecutive units (L=7) are allocated to the PUSCH from startunit #S (here, S=3).

As shown in FIG. 6B, in the case of the time unit basis, the value(s) ofthe SLIV or S and L is interpreted, instead of the value indicating thesymbol allocated to the PUSCH, as the value indicating the time unitallocated to the PUSCH.

In the case of the time unit basis, the minimum value of the time domainresource allocated to the PUSCH is equal to the length of one time unit(for example, 2 symbols in FIG. 6B). The maximum value of the timedomain resource is a value obtained by multiplying the length of onetime unit by the number of time units (=14) (for example, 28 symbols inFIG. 5B).

As shown in FIG. 6B, by alternatively interpreting the SLIV (or S and L)as the value indicating the time unit allocated to the PUSCH, the timedomain resource over a plurality of slots can be allocated to the PUSCHby reusing ab existing method.

Note that the UE may determine on which the symbol basis or the unitbasis the value(s) of the SLIV or S and L indicates the time domainresource for the PUSCH, based on at least one of the following (1) to(4).

(1) RNTI used for CRC scramble of the DCI(2) Size of the DCI format(3) Configuration of a search space in which the DCI is monitored(4) Frequency band (for example, a CC or a BWP) in which the DCI isdetected

Alternatively, on which the symbol basis or the unit basis the value(s)of the SLIV or S and L indicates the time domain resource for the PUSCHmay be configured for the UE by using the higher layer parameter (forexample, the RRC IE).

When the PUSCH is scheduled by using DCI format 0_0, the UE may assumeor expect that the SLIV (or S and L) that is determined based on theTDRA field value in the DCI format 0_0 is on the symbol basis.

In the second time domain resource determination, the time domainresource of the PUSCH for the multi-segment transmission can beappropriately determined by reusing the method of determining the timedomain resource according to the existing SLIV (or the start symbol Sand the number L of symbols), even without reporting the referencetiming value S′ as in the case of the first time domain resourcedetermination.

As described above, in the first aspect, the time domain resourceallocated in the multi-segment transmission can be determined while themethod that premises the allocation of the time domain resource in asingle slot in the given transmission occasion is reused. Therefore, themulti-segment transmission can be introduced while increase of animplementation load is suppressed.

(Second Aspect)

In the second aspect, repetition of the multi-segment transmission willbe described. When the UE receives information indicating the number Xof times of repetition (also referred to as an aggregation factor, thenumber of aggregations, a repetition factor, or the like), the UE mayassume that the multi-segment transmission is repeated X times (X timesof transmission occasions).

The UE may assume that the time domain resource is allocated by usingthe same pattern in each repetition (transmission occasion). The patternmay include at least one of the start position and the time length inthe given transmission occasion.

For example, the pattern may include the start symbol relative to thereference timing (for example, symbol #S′) indicated by the referencetiming value S′ and the number of symbols (the first time domainresource determination), or may include the start unit relative to thestart of the slot and the number of units (the second time domainresource determination). In this manner, the second aspect can beapplied in combination with the first aspect.

For the UE, in the multi-segment transmission with the number X of timesof repetition, X′ consecutive slots (for example, X′=X+1), X′ being anumber greater than X, may be used (first repeated transmission), or Xconsecutive slots may be used (second repeated transmission).

In the second aspect described below, the PUSCH will be mainlydescribed. However, the present invention can be applied to otherchannels (for example, the PUSCH) as well as appropriate. In thedescription below, the dynamic grant-based PUSCH will be described.However, the present invention can be applied to the PUSCH based on theconfiguration grant of type 2 or the configuration grant of type 1 aswell as appropriate.

<First Repeated Transmission>

In the first repeated transmission, the UE may assume that X times ofthe multi-segment transmission are repeated over the X′ consecutiveslots, X′ being a number greater than the number X of times ofrepetition of the multi-segment transmission.

FIG. 7A is a diagram to show an example of the first repeatedtransmission according to the second aspect. FIG. 7A shows an example inwhich the PUSCH with the number X of times of repetition (here, X=4) isscheduled by using a single piece of the DCI. The number X of times ofrepetition only needs to be specified for the UE by using at least oneof the higher layer parameter and the DCI. In FIG. 7A, the time domainresource allocated to the PUSCH is shown in the j (for example,1≤j≤X)-th repetition (transmission occasion).

As shown in FIG. 7A, when the multi-segment transmission is not applied,slots (for example, four slots in FIG. 7A) whose number is equal to thenumber X of times of repetition may be used for transmission of thePUSCH. On the other hand, when the multi-segment transmission isapplied, X′ slots (for example, five slots in FIG. 7A) may be used fortransmission of the PUSCH, X′ being a number greater than the number Xof times of repetition.

Among the X times of repetition (transmission occasion) of themulti-segment transmission, different RVs may be applied to the TBs thatare based on the same data. The RV applied to each of the X times ofrepetition may be specified by using a value of a given field (forexample, the RV field) in the DCI, or may be configured by using RRCsignaling (higher layer parameter) or the like.

As shown in FIG. 7A, the time domain resource allocated in the samepattern may be used in all of the X times of repetition (transmissionoccasion), regardless of whether or not the transmission is themulti-segment transmission. In this case, gains of the repetition can beappropriately obtained also when the multi-segment transmission isperformed.

<Second Repeated Transmission>

In the second repeated transmission, the UE may assume that transmissionof at least a part of the multi-segment transmission is cancelled in thetransmission occasion including a symbol that exceeds the consecutiveslots whose number is equal to the number X of times of repetition ofthe multi-segment transmission.

FIG. 7B is a diagram to show an example of the second repeatedtransmission according to the second aspect. In FIG. 7B, difference fromFIG. 7A will be mainly described. As shown in FIG. 7B, when themulti-segment transmission is applied, a part of the time domainresource for the multi-segment transmission in a given transmissionoccasion (for example, the j (=X)-th transmission occasion) is allocatedbeyond the X consecutive slots. In this case, the UE may cancel thetransmission (transmission of a part of the segment) in the part of thetime domain resource.

In FIG. 7B, only the consecutive slots (four slots in FIG. 7B) whosenumber is equal to the number X of times of repetition are used forrepetition of the multi-segment transmission. This can preventcomplication of control of scheduling due to unmatch between the numberX of times of repetition and the number of consecutive slots inrepetition of the multi-segment transmission.

As described above, according to the second aspect, the UE can performappropriate control also when the multi-segment transmission isperformed with repetition. By setting the number of slots in which themulti-segment transmission is performed to the number of times that isthe same as the configured number of times of repetition, the basestation can appropriately perform resource control.

(Third Aspect)

In a third aspect, frequency hopping when repetition of themulti-segment transmission is performed will be described. In a case ofrepetition of the single segment transmission, as described above, theinter-slot frequency hopping (for example, FIG. 3A) can be applied. Onthe other hand, in a case of repetition of the multi-segmenttransmission, a problem is how to control the frequency hopping.

In the third aspect, the frequency hopping in the case of repetition ofthe multi-segment transmission may be controlled for each slot (firstfrequency hopping procedure), or may be controlled for each repetition(transmission occasion) (second frequency hopping procedure).

In the third aspect described below, the PUSCH will be mainly described.However, the present invention can be applied to other channels (forexample, the PUSCH) as well as appropriate. In the description below,the dynamic grant-based PUSCH will be described. However, the presentinvention can be applied to the PUSCH based on the configuration grantof type 2 or the configuration grant of type 1 as well as appropriate.

<First Frequency Hopping Procedure>

In the first frequency hopping procedure, when the multi-segmenttransmission is repeated, frequency hopping in one transmission occasion(one repetition, one multi-segment transmission) may be applied with theslot boundary being used as the frequency hopping boundary.

FIG. 8 is a diagram to show an example of the first frequency hoppingprocedure according to the third aspect. In FIG. 8, difference from FIG.3A will be mainly described. In FIG. 8, the offset RB_(offset) betweenhops may be specified by using at least one of the higher layerparameter and the DCI.

The UE may determine the index of the start RB allocated to themulti-segment transmission transmitted with repetition of X times, basedon a given field value in the DCI (for example, an FDRA field value) orthe higher layer parameter (for example, “frequencyDomainAllocation” inthe RRC IE “rrc-ConfiguredUplinkGrant”).

As shown in FIG. 8, in repetition of the multi-segment transmission, thefrequency resource may be hopped in one transmission occasion (onerepetition) with the slot boundary being used as the frequency hoppingboundary.

For example, in FIG. 8, the index of the start RB of the segment (firstsegment) before the slot boundary in the j-th transmission occasion maybe RB_(start), and the index of the start RB of the segment (secondsegment) after the slot boundary in the transmission occasion may becalculated by using at least one of RB_(start), RB_(offset), and N_(BWP)(for example, according to Expression (3) shown above).

Note that, although not shown, it goes without saying that the start RBof the first segment may be determined by using at least one ofRB_(start), RB_(offset), and N_(BWP), and the start RB of the secondsegment may be RB_(start).

In FIG. 8, patterns of the frequency hopping between the transmissionoccasions are the same, but the present invention is not limited tothis. For example, as shown in FIG. 9, the patterns of the frequencyhopping may be different between the transmission occasions.Specifically, as shown in FIG. 9, the index of the start RB of the firstsegment and the index of the start RB of the second segment may beinterchanged with each other between adjacent transmission occasions(the j-th transmission occasion and the (j+1)-th transmission occasion).In this case, for example, as shown in FIG. 9, a pattern in which thefrequency hopping is not performed in a slot (in other words, the samefrequency resource is used) can be employed.

For example, in FIG. 9, the index of the start RB of the first segmentin the j-th (for example, j is an odd number) transmission occasion maybe RB_(start), and the index of the start RB of the second segment inthe transmission occasion may be a value calculated based on at leastone of RB_(start), RB_(offset), and N_(BWP) (for example, Expression(3)).

On the other hand, the index of the start RB of the first segment in the(j+1)-th (for example, (j+1) is an even number) transmission occasionmay be a value calculated based on at least one of RB_(start),RB_(offset), and N_(BWP) (for example, Expression (3)), and the index ofthe start RB of the second segment that belongs to slot #n+2 in thetransmission occasion may be RB_(start). Note that FIGS. 8 and 9 aremerely an example, and the start RB of each hop is not limited to thoseshown in the figures.

As described above, the start RBs of the first segment and the secondsegment may be determined based on in what number in transmissionoccasions.

Alternatively, the start RBs of the first segment and the second segmentmay be determined based on from which slot number of a slot thetransmission occasion starts. For example, when the index of the startRB of the first segment in the transmission occasion starting from aslot of an even-numbered slot number is RB_(start), the index of thestart RB of the first segment in the transmission occasion starting froman odd-numbered slot number may be a value calculated based on at leastone of RB_(start), RB_(offset), and N_(BWP) (for example, Expression(3)).

In FIG. 9, the same frequency resource is used for transmission of thesegments (for example, the second segment in the j-th transmissionoccasion and the first segment in the (j+1)-th transmission occasion)that belong to different transmission occasions in the same slot.Therefore, with the use of channel estimation results for the secondsegment in a preceding transmission occasion, channel estimation for thefirst segment in its subsequent transmission occasion can be performed.

In the first frequency hopping procedure, when the inter-slot frequencyhopping is configured by using the higher layer parameter, the frequencyhopping in each transmission occasion using the slot boundary as thefrequency hopping boundary (also referred to as intra-multi-segmenttransmission frequency hopping, intra-transmission occasion frequencyhopping, or the like) may be applied to the multi-segment transmission.

Alternatively, when the intra-slot frequency hopping is configured byusing the higher layer parameter, the intra-multi-segment transmissionfrequency hopping may be applied to the multi-segment transmission.Alternatively, when the intra-multi-segment transmission frequencyhopping is configured by using the higher layer parameter apart from theinter-slot frequency hopping or the intra-inter-slot frequency hopping,the intra-multi-segment transmission frequency hopping may be applied tothe multi-segment transmission.

In the first frequency hopping procedure, the frequency hopping can becontrolled by using the slot boundary as a reference in themulti-segment transmission as well.

<Second Frequency Hopping Procedure>

In the second frequency hopping procedure, when the multi-segmenttransmission is repeated, hopping of the frequency resource may becontrolled in each transmission occasion.

FIG. 10 is a diagram to show an example of the second frequency hoppingprocedure according to the third aspect. In FIG. 10, difference fromFIG. 8 will be mainly described. As shown in FIG. 10, in repetition ofthe multi-segment transmission, the frequency resource may be hoppedbetween transmission occasions (repetitions) in a manner similar to thesingle segment transmission.

For example, in FIG. 10, the index of the start RB in the j-th (forexample, j is an odd number) transmission occasion may be RB_(start),and the index of the start RB of the first segment in the (j+1)-th (forexample, (j+1) is an even number) transmission occasion may be a valuecalculated based on at least one of RB_(start), RB_(offset), and N_(BWP)(for example, Expression (3)). Note that FIG. 10 is merely an example,and the start RB of each hop is not limited to those shown in thefigure.

As described above, the start RB of each transmission occasion may bedetermined based on in what number in transmission occasions.

Alternatively, the start RB of each transmission occasion may bedetermined based on from which slot number of a slot the transmissionoccasion starts. For example, when the index of the start RB in thetransmission occasion starting from a slot of an even-numbered slotnumber is RB_(start), the index of the start RB in the transmissionoccasion starting from an odd-numbered slot number may be a valuecalculated based on at least one of RB_(start), RB_(offset), and N_(BWP)(for example, Expression (3)).

In the second frequency hopping procedure, when the inter-slot frequencyhopping is configured by using the higher layer parameter, the frequencyhopping between the transmission occasions (repetitions) (also referredto as inter-multi-segment transmission frequency hopping,inter-transmission occasion frequency hopping, or the like) may beapplied to the multi-segment transmission.

Alternatively, when the intra-slot frequency hopping is configured byusing the higher layer parameter, the inter-multi-segment transmissionfrequency hopping may be applied to the multi-segment transmission.Alternatively, when the inter-multi-segment transmission frequencyhopping is configured by using the higher layer parameter apart from theinter-slot frequency hopping or the intra-inter-slot frequency hopping,the inter-multi-segment transmission frequency hopping may be applied tothe multi-segment transmission.

In the second frequency hopping procedure, the frequency hopping can beperformed between transmission occasions in both of the multi-segmenttransmission and the single segment transmission.

Modification Examples

In the first or second frequency hopping procedure, the first or secondrepeated transmission according to the second aspect may be combined.Specifically, as described in the first repeated transmission (forexample, FIG. 7A) according to the second aspect, FIGS. 8 to 10described above illustrate a case in which the UE assumes that X timesof the multi-segment transmission are repeated over the X′ consecutiveslots, X′ being a number greater than the number X of times ofrepetition of the multi-segment transmission. However, the presentinvention is not limited to this case.

As described in the second repeated transmission (for example, FIG. 7B)according to the second aspect, the UE may cancel at least a part of thetransmission of the multi-segment transmission in a slot exceeding thenumber X of times of repetition of the multi-segment transmission.

For example, in the multi-segment transmission shown in FIG. 8, thesecond segment in the fourth transmission occasion (transmissionoccasion indicated by j=4) belongs to a slot that exceeds the number ofrepetitions (=4) (the fifth slot from the slot in which the firsttransmission occasion starts). Thus, the UE may cancel the transmissionof the second segment in the fourth transmission occasion (need notperform the transmission). In a similar manner, the UE may cancel thetransmission of the second segment in the fourth transmission occasionin the multi-segment transmissions shown in FIGS. 9 and 10 as well (neednot perform the transmission).

Note that it goes without saying that the time domain resource allocatedto the PUSCH in each transmission occasion in FIGS. 8 to 10 describedabove can be determined by applying the first or second time domainresource determination described in the above first aspect.

As described above, according to the third aspect, the frequency hoppingcan be appropriately controlled also when the multi-segment transmissionis performed with repetition.

(Fourth Aspect)

In the fourth aspect, the frequency hopping in the transmission occasionwill be described. In the single segment transmission, the intra-slotfrequency hopping (for example, FIG. 3B) can be applied in both of acase with repetition and a case of a single transmission withoutrepetition. On the other hand, in the multi-segment transmission, aproblem is how to control the frequency hopping in the transmissionoccasion (also referred to as intra-transmission occasion frequencyhopping, intra-multi-segment transmission frequency hopping, or thelike).

In the fourth aspect, the frequency hopping boundary in theintra-transmission occasion frequency hopping may be determined based onthe number N_(symb) of symbols allocated to the PUSCH (first frequencyhopping boundary determination), or may be determined based on the slotboundary (second frequency hopping boundary determination).

Note that the intra-transmission occasion frequency hopping can beapplied to both of the single segment transmission and the multi-segmenttransmission. The intra-transmission occasion frequency hopping can beapplied to at least one of the case with repetition and case of a singletransmission without repetition of the single segment transmission orthe multi-segment transmission.

In the fourth aspect described below, the PUSCH will be mainlydescribed. However, the present invention can be applied to otherchannels (for example, the PUSCH) as well as appropriate. In thedescription below, the dynamic grant-based PUSCH will be described.However, the present invention can be applied to the PUSCH based on theconfiguration grant of type 2 or the configuration grant of type 1 aswell as appropriate.

<First Frequency Hopping Boundary Determination>

In the first frequency hopping boundary determination, the UE maydetermine the frequency hopping boundary (the number of symbols of eachhop), based on the number N_(symb) of symbols allocated to the PUSCH.

FIGS. 11A and 11B are each a diagram to show an example of the firstfrequency hopping boundary determination according to the fourth aspect.In FIGS. 11A and 11B, difference from FIG. 3B will be mainly described.The offset RB_(OFFSET) may be determined based on at least one of thehigher layer parameter and a value of a given field in the DCI. Notethat FIGS. 11A and 11B are merely an example, and the start RB of eachhop is not limited to those shown in the figures.

As shown in FIG. 11A, in a case of the single segment transmission, theUE may determine the frequency hopping boundary in a given transmissionoccasion, based on the number N_(symb) of symbols allocated to thePUSCH.

As shown in FIG. 11B, in a case of the multi-segment transmission, theUE may determine the frequency hopping boundary in a given transmissionoccasion, based on the number N_(symb) of symbols allocated to thePUSCH.

For example, in FIGS. 11A and 11B, the UE determines the number ofsymbols of the first hop according to floor(N_(symb)/2), and determinesthe number of symbols of the second hop according toN_(symb)−floor(N_(symb)/2). Note that the number of symbols of each hopis not limited to being determined according to the expressions shownabove.

In FIGS. 11A and 11B, the UE may determine the index of the start symbolof the PUSCH, based on the reference timing value S′ (the first timedomain resource determination), or may determine the index, based on theindex of the unit including a plurality of consecutive symbols (thesecond time domain resource determination). As described above, thefirst frequency hopping boundary determination can be applied incombination with the first aspect.

In the first frequency hopping boundary determination, as shown in FIGS.11A and 11B, the number of symbols of each hop (in other words, thefrequency hopping boundary) can be determined so as to be shared by thesingle segment transmission and the multi-segment transmission.

<Second Frequency Hopping Boundary Determination>

In the second frequency hopping boundary determination, the UE maydetermine the frequency hopping boundary (the number of symbols of eachhop), based on the slot boundary in the transmission occasion of thePUSCH.

FIGS. 12A and 12B are each a diagram to show an example of the secondfrequency hopping boundary determination according to the fourth aspect.In FIGS. 12A and 12B, difference from FIG. 11B will be mainly described.Note that FIGS. 12A and 12B are merely an example, and the start RB ofeach hop is not limited to those shown in the figures.

As shown in FIG. 12A, in a case of the multi-segment transmission, theUE may determine the slot boundary in a given transmission occasion asthe frequency hopping boundary in the transmission occasion.

As shown in FIG. 12B, in a case of the multi-segment transmission, theUE may determine the frequency hopping boundary in the transmissionoccasion, based on the slot boundary in the given transmission occasionand the number of symbols of each segment.

Specifically, in FIG. 12B, the UE may determine the frequency hoppingboundary in the first segment, based on the number A_(symb) of symbolsof the first segment. For example, in FIG. 12B, the UE determines thenumber of symbols of the first hop of the first segment according tofloor(A_(symb)/2), and determines the number of symbols of the secondhop of the first segment according to A_(symb)−floor (A_(symb)/2).

In FIG. 12B, the UE may determine the frequency hopping boundary in thesecond segment, based on the number B_(symb) of symbols of the secondsegment. For example, in FIG. 12B, the UE determines the number ofsymbols of the first hop of the second segment according tofloor(B_(symb)/2), and determines the number of symbols of the secondhop of the first segment according to B_(symb)−floor(B_(symb)/2). Notethat the number of symbols of each hop of each segment is not limited tobeing determined according to the expressions shown above.

As shown in FIG. 12B, the offset RB_(offset) between hops may be thesame between segments, or may be different for each individual segment.In the latter case, the offset RB_(offset) may be specified based on thehigher layer parameter and the given field value in the DCI for eachindividual segment.

In FIGS. 12A and 12B, the UE may determine the index of the start symbolof the PUSCH, based on the reference timing value S′ (the first timedomain resource determination), or may determine the index, based on theindex of the unit including a plurality of consecutive symbols (thesecond time domain resource determination). As described above, thesecond frequency hopping boundary determination can be applied incombination with the first aspect.

In the second frequency hopping boundary determination, as shown inFIGS. 12A and 12B, the number of symbols of each hop (in other words,the frequency hopping boundary) can be appropriately determined, basedon the slot boundary in the transmission occasion.

As described above, according to the fourth aspect, theintra-transmission occasion frequency hopping can be appropriatelycontrolled.

(Fifth Aspect)

In the fifth aspect, definition of the transmission occasion i for thetransmission power control of the multi-segment transmission will bedescribed. The UE performs the transmission power control for eachtransmission occasion i for the multi-segment transmission. Thetransmission occasion i may be a transmission occasion of the PUSCH, thePUCCH, the SRS, or the PRACH.

The transmission occasion i may follow at least one of transmissionoccasion types 1 and 2 described below.

<Transmission Occasion Type 1>

When transmission is the multi-segment transmission, the transmissionoccasion i occurs over a plurality of consecutive slots. In other words,the transmission occasion i is a period of the multi-segmenttransmission.

The transmission occasion i may be defined by one or more slot indicesn_(s,f) ^(μ), the first symbol S in the first slot of one or moreconsecutive slots, and the number L of consecutive symbols. n_(s,f) ^(μ)may represent a slot index of one or more consecutive slots across whichthe multi-segment transmission occurs in a frame having a system framenumber SFN. L may represent the number of consecutive symbols across oneor more consecutive slots.

The transmission occasion i may be defined by the slot index n_(s,f)^(μ) in the frame having the system frame number SFN, the first symbol Sin the slot, and the number L of consecutive symbols. n_(s,f) ^(μ) mayrepresent an index of the first slot of transmission. L may representthe number of consecutive symbols across one or more consecutive slots.

As shown in FIG. 13, the UE may determine (calculate) the transmit powerof the transmission occasion i, and may apply the obtained transmitpower to the transmission occasion i. In other words, the UE maydetermine the transmit power for all of the periods of the multi-segmenttransmission, and may apply the obtained transmit power to all of theperiods of the multi-segment transmission. A configuration that the UEis not allowed to change the transmit power during the multi-segmenttransmission over a plurality of slots may be employed. The UE cancontrol the transmit power for each channel/signal (multi-segmenttransmission) by using transmission occasion type 1.

The UE may receive the TPC command before the multi-segmenttransmission, and apply the TPC command to the transmission occasion i(whole of the multi-segment transmission).

If the UE performs two or more multi-segment transmissions and the lastsegment of the first multi-segment transmission and the first segment ofthe second multi-segment transmission are included in one slot, the UEmay determine the transmit power for the last segment of the firstmulti-segment transmission and may determine the transmit power for thefirst segment of the second multi-segment transmission.

The frequency hopping in the slot boundary may not be applied to themulti-segment transmission. In the UE, the frequency hopping in the slotboundary need not be configured for the multi-segment transmission. Forexample, at least one of the second aspect (FIGS. 7A and 7B), the secondfrequency hopping procedure according to the third aspect (FIG. 10), andthe first frequency hopping boundary determination according to thefourth aspect (FIGS. 11A and 11B) may be applied to the multi-segmenttransmission. The UE may use transmission occasion type 1 for themulti-segment transmission as described above. When the UE performs bothof the transmission power control and the frequency hopping for eachchannel/signal (multi-segment transmission), the processing is madeeasier.

In the multi-segment PUSCH transmission over two slots, the UE maytransmit the DMRS only in the first slot (segment). In this case, theDMRS in the first slot may be used for channel estimation (demodulation)in the first slot and the second slot. The UE may use transmissionoccasion type 1 for the multi-segment transmission as described above.In this case, when both of the transmission power control and the DMRStransmission are performed for each channel/signal (multi-segmenttransmission), the processing is made easier.

<Transmission Occasion Type 2>

The transmission occasion i is a part of transmission in one slot out ofa plurality of consecutive slots across which the multi-segmenttransmission is performed. In other words, the transmission occasion iis each segment in the multi-segment transmission.

The transmission occasion i of the PUSCH, the PUCCH, the SRS, or thePRACH may be defined by the slot index n_(s,f) ^(μ) in the frame havingthe system frame number SFN, the first symbol S in one slot, and thenumber L of consecutive symbols in the slot.

As shown in FIG. 14, the UE may determine (calculate) the transmit powerof the transmission occasion i, and may apply the obtained transmitpower to the transmission occasion i. In other words, the UE determinesthe transmit power for each segment of the multi-segment transmission,and applies the obtained transmit power to a corresponding segment. TheUE may change the transmit power for each slot in the multi-segmenttransmission over a plurality of slots. The UE can control the transmitpower for each slot (segment) by using transmission occasion type 2.

The UE may receive the TPC command before the multi-segmenttransmission, and may apply the TPC command to one transmission occasioni (segment) in the multi-segment transmission. For example, the UE mayreceive the TPC command before the multi-segment transmission over twoslots, and may apply the TPC command to the first transmission occasion(segment) in the multi-segment transmission or may apply the TPC commandto the second transmission occasion (segment) in the multi-segmenttransmission.

If the UE performs two or more multi-segment transmissions and the lastsegment of the first multi-segment transmission and the first segment ofthe second multi-segment transmission are included in one slot, the UEmay determine one transmit power for both of the last segment of thefirst multi-segment transmission and the first segment of the secondmulti-segment transmission.

The frequency hopping in the slot boundary may be applied to themulti-segment transmission. In the UE, the frequency hopping in the slotboundary may be configured for the multi-segment transmission. Forexample, at least one of the first frequency hopping procedure accordingto the third aspect (FIG. 8 and FIG. 9) and the first frequency hoppingboundary determination according to the fourth aspect (FIGS. 12A and12B) may be applied to the multi-segment transmission. The UE may usetransmission occasion type 2 for the multi-segment transmission. In thiscase, when the UE performs both of the transmission power control andthe frequency hopping for each slot, the processing is made easier.

In the multi-segment PUSCH transmission over two slots, the UE maytransmit the DMRS in each slot (segment). In this case, the DMRS in thefirst slot may be used for channel estimation (demodulation) of thefirst slot, and the DMRS in the second slot may be used for channelestimation (demodulation) of the second slot. In this case, accuracy ofthe channel estimation in the base station can be enhanced. The UE mayuse transmission occasion type 2 for the PUSCH transmission as describedabove. In this case, when the UE performs both of the transmission powercontrol and the DMRS transmission for each slot, quality of the PUSCHtransmission can be enhanced.

The UE may use at least one of carrier aggregation (CA) and dualconnectivity (DC) to perform the multi-segment transmission in a givenCC and also simultaneously perform the UL transmission in another CC.The UE may use transmission occasion type 2 for the multi-segmenttransmission. In this case, when both of the transmit power of themulti-segment transmission and the transmit power of the UL transmissionin another CC are controlled for each slot, the transmission powercontrol is made easier.

<Configuration of Transmission Occasion Types>

The UE may support at least one of transmission occasion types 1 and 2.The UE may report UE capability information indicating the transmissionoccasion type (at least one of transmission occasion types 1 and 2) tobe supported.

In the UE, one of transmission occasion types 1 and 2 may be configuredvia higher layer signaling (for example, RRC signaling).

As described above, a preferable transmission occasion type is differentdepending on a condition of the frequency hopping, the DMRS, the ULtransmission in another CC, and the like, and thus the transmissionoccasion type can be flexibly switched depending on the condition.

The UE may receive configuration information of the multi-segmenttransmission including at least one of the transmission occasion type,the frequency hopping, and the DMRS via higher layer signaling.

As described above, according to the fifth aspect, the transmit power ofthe multi-segment transmission can be appropriately controlled.

(Radio Communication System)

Hereinafter, a structure of a radio communication system according toone embodiment of the present disclosure will be described. In thisradio communication system, the radio communication method according toeach embodiment of the present disclosure described above may be usedalone or may be used in combination for communication.

FIG. 15 is a diagram to show an example of a schematic structure of theradio communication system according to one embodiment. The radiocommunication system 1 may be a system implementing a communicationusing Long Term Evolution (LTE), 5th generation mobile communicationsystem New Radio (5G NR) and so on the specifications of which have beendrafted by Third Generation Partnership Project (3GPP).

The radio communication system 1 may support dual connectivity(multi-RAT dual connectivity (MR-DC)) between a plurality of RadioAccess Technologies (RATs). The MR-DC may include dual connectivity(E-UTRA-NR Dual Connectivity (EN-DC)) between LTE (Evolved UniversalTerrestrial Radio Access (E-UTRA)) and NR, dual connectivity (NR-E-UTRADual Connectivity (NE-DC)) between NR and LTE, and so on.

In EN-DC, a base station (eNB) of LTE (E-UTRA) is a master node (MN),and a base station (gNB) of NR is a secondary node (SN). In NE-DC, abase station (gNB) of NR is an MN, and a base station (eNB) of LTE(E-UTRA) is an SN.

The radio communication system 1 may support dual connectivity between aplurality of base stations in the same RAT (for example, dualconnectivity (NR-NR Dual Connectivity (NN-DC)) where both of an MN andan SN are base stations (gNB) of NR).

The radio communication system 1 may include a base station 11 thatforms a macro cell C1 of a relatively wide coverage, and base stations12 (12 a to 12 c) that form small cells C2, which are placed within themacro cell C1 and which are narrower than the macro cell C1. The userterminal 20 may be located in at least one cell. The arrangement, thenumber, and the like of each cell and user terminal 20 are by no meanslimited to the aspect shown in the diagram. Hereinafter, the basestations 11 and 12 will be collectively referred to as “base stations10,” unless specified otherwise.

The user terminal 20 may be connected to at least one of the pluralityof base stations 10. The user terminal 20 may use at least one ofcarrier aggregation (CA) and dual connectivity (DC) using a plurality ofcomponent carriers (CCs).

Each CC may be included in at least one of a first frequency band(Frequency Range 1 (FR1)) and a second frequency band (Frequency Range 2(FR2)). The macro cell C1 may be included in FR1, and the small cells C2may be included in FR2. For example, FR1 may be a frequency band of 6GHz or less (sub-6 GHz), and FR2 may be a frequency band which is higherthan 24 GHz (above-24 GHz). Note that frequency bands, definitions andso on of FR1 and FR2 are by no means limited to these, and for example,FR1 may correspond to a frequency band which is higher than FR2.

The user terminal 20 may communicate using at least one of time divisionduplex (TDD) and frequency division duplex (FDD) in each CC.

The plurality of base stations 10 may be connected by a wired connection(for example, optical fiber in compliance with the Common Public RadioInterface (CPRI), the X2 interface and so on) or a wireless connection(for example, an NR communication). For example, if an NR communicationis used as a backhaul between the base stations 11 and 12, the basestation 11 corresponding to a higher station may be referred to as an“Integrated Access Backhaul (IAB) donor,” and the base station 12corresponding to a relay station (relay) may be referred to as an “IABnode.”

The base station 10 may be connected to a core network 30 throughanother base station 10 or directly. For example, the core network 30may include at least one of Evolved Packet Core (EPC), 5G Core Network(5GCN), Next Generation Core (NGC), and so on.

The user terminal 20 may be a terminal supporting at least one ofcommunication schemes such as LTE, LTE-A, 5G, and so on.

In the radio communication system 1, an orthogonal frequency divisionmultiplexing (OFDM)-based wireless access scheme may be used. Forexample, in at least one of the downlink (DL) and the uplink (UL),Cyclic Prefix OFDM (CP-OFDM), Discrete Fourier Transform Spread OFDM(DFT-s-OFDM), Orthogonal Frequency Division Multiple Access (OFDMA),Single Carrier Frequency Division Multiple Access (SC-FDMA), and so onmay be used.

The wireless access scheme may be referred to as a “waveform.” Notethat, in the radio communication system 1, another wireless accessscheme (for example, another single carrier transmission scheme, anothermulti-carrier transmission scheme) may be used for a wireless accessscheme in the UL and the DL.

In the radio communication system 1, a downlink shared channel (PhysicalDownlink Shared Channel (PDSCH)), which is used by each user terminal 20on a shared basis, a broadcast channel (Physical Broadcast Channel(PBCH)), a downlink control channel (Physical Downlink Control Channel(PDCCH)) and so on, may be used as downlink channels.

In the radio communication system 1, an uplink shared channel (PhysicalUplink Shared Channel (PUSCH)), which is used by each user terminal 20on a shared basis, an uplink control channel (Physical Uplink ControlChannel (PUCCH)), a random access channel (Physical Random AccessChannel (PRACH)) and so on may be used as uplink channels.

User data, higher layer control information, System Information Blocks(SIBs) and so on are communicated on the PDSCH. User data, higher layercontrol information and so on may be communicated on the PUSCH. TheMaster Information Blocks (MIBs) may be communicated on the PBCH.

Lower layer control information may be communicated on the PDCCH. Forexample, the lower layer control information may include downlinkcontrol information (DCI) including scheduling information of at leastone of the PDSCH and the PUSCH.

Note that DCI for scheduling the PDSCH may be referred to as “DLassignment,” “DL DCI,” and so on, and DCI for scheduling the PUSCH maybe referred to as “UL grant,” “UL DCI,” and so on. Note that the PDSCHmay be interpreted as “DL data”, and the PUSCH may be interpreted as “ULdata”.

For detection of the PDCCH, a control resource set (CORESET) and asearch space may be used. The CORESET corresponds to a resource tosearch DCI. The search space corresponds to a search area and a searchmethod of PDCCH candidates. One CORESET may be associated with one ormore search spaces. The UE may monitor a CORESET associated with a givensearch space, based on search space configuration.

One search space may correspond to a PDCCH candidate corresponding toone or more aggregation levels. One or more search spaces may bereferred to as a “search space set.” Note that a “search space,” a“search space set,” a “search space configuration,” a “search space setconfiguration,” a “CORESET,” a “CORESET configuration” and so on of thepresent disclosure may be interchangeably interpreted.

Uplink control information (UCI) including at least one of channel stateinformation (CSI), transmission confirmation information (for example,which may be also referred to as Hybrid Automatic Repeat reQuestACKnowledgement (HARQ-ACK), ACK/NACK, and so on), and scheduling request(SR) may be communicated by means of the PUCCH. By means of the PRACH,random access preambles for establishing connections with cells may becommunicated.

Note that the downlink, the uplink, and so on in the present disclosuremay be expressed without a term of “link.” In addition, various channelsmay be expressed without adding “Physical” to the head.

In the radio communication system 1, a synchronization signal (SS), adownlink reference signal (DL-RS), and so on may be communicated. In theradio communication system 1, a cell-specific reference signal (CRS), achannel state information reference signal (CSI-RS), a demodulationreference signal (DMRS), a positioning reference signal (PRS), a phasetracking reference signal (PTRS), and so on may be communicated as theDL-RS.

For example, the synchronization signal may be at least one of a primarysynchronization signal (PSS) and a secondary synchronization signal(SSS). A signal block including an SS (PSS, SSS) and a PBCH (and a DMRSfor a PBCH) may be referred to as an “SS/PBCH block,” an “SS Block(SSB),” and so on. Note that an SS, an SSB, and so on may be alsoreferred to as a “reference signal.”

In the radio communication system 1, a sounding reference signal (SRS),a demodulation reference signal (DMRS), and so on may be communicated asan uplink reference signal (UL-RS). Note that DMRS may be referred to asa “user terminal specific reference signal (UE-specific ReferenceSignal).”

(Base Station)

FIG. 16 is a diagram to show an example of a structure of the basestation according to one embodiment. The base station 10 includes acontrol section 110, a transmitting/receiving section 120,transmitting/receiving antennas 130 and a transmission line interface140. Note that the base station 10 may include one or more controlsections 110, one or more transmitting/receiving sections 120, one ormore transmitting/receiving antennas 130, and one or more transmissionline interfaces 140.

Note that, the present example primarily shows functional blocks thatpertain to characteristic parts of the present embodiment, and it isassumed that the base station 10 may include other functional blocksthat are necessary for radio communication as well. Part of theprocesses of each section described below may be omitted.

The control section 110 controls the whole of the base station 10. Thecontrol section 110 can be constituted with a controller, a controlcircuit, or the like described based on general understanding of thetechnical field to which the present disclosure pertains.

The control section 110 may control generation of signals, scheduling(for example, resource allocation, mapping), and so on. The controlsection 110 may control transmission and reception, measurement and soon using the transmitting/receiving section 120, thetransmitting/receiving antennas 130, and the transmission line interface140. The control section 110 may generate data, control information, asequence and so on to transmit as a signal, and forward the generateditems to the transmitting/receiving section 120. The control section 110may perform call processing (setting up, releasing) for communicationchannels, manage the state of the base station 10, and manage the radioresources.

The transmitting/receiving section 120 may include a baseband section121, a Radio Frequency (RF) section 122, and a measurement section 123.The baseband section 121 may include a transmission processing section1211 and a reception processing section 1212. The transmitting/receivingsection 120 can be constituted with a transmitter/receiver, an RFcircuit, a baseband circuit, a filter, a phase shifter, a measurementcircuit, a transmitting/receiving circuit, or the like described basedon general understanding of the technical field to which the presentdisclosure pertains.

The transmitting/receiving section 120 may be structured as atransmitting/receiving section in one entity, or may be constituted witha transmitting section and a receiving section. The transmitting sectionmay be constituted with the transmission processing section 1211, andthe RF section 122. The receiving section may be constituted with thereception processing section 1212, the RF section 122, and themeasurement section 123.

The transmitting/receiving antennas 130 can be constituted withantennas, for example, an array antenna, or the like described based ongeneral understanding of the technical field to which the presentdisclosure pertains.

The transmitting/receiving section 120 may transmit the above-describeddownlink channel, synchronization signal, downlink reference signal, andso on. The transmitting/receiving section 120 may receive theabove-described uplink channel, uplink reference signal, and so on.

The transmitting/receiving section 120 may form at least one of atransmission beam and a reception beam by using digital beam forming(for example, precoding), analog beam forming (for example, phaserotation), and so on.

The transmitting/receiving section 120 (transmission processing section1211) may perform the processing of the Packet Data Convergence Protocol(PDCP) layer, the processing of the Radio Link Control (RLC) layer (forexample, RLC retransmission control), the processing of the MediumAccess Control (MAC) layer (for example, HARQ retransmission control),and so on, for example, on data and control information and so onacquired from the control section 110, and may generate bit string totransmit.

The transmitting/receiving section 120 (transmission processing section1211) may perform transmission processing such as channel coding (whichmay include error correction coding), modulation, mapping, filtering,discrete Fourier transform (DFT) processing (as necessary), inverse fastFourier transform (IFFT) processing, precoding, digital-to-analogconversion, and so on, on the bit string to transmit, and output abaseband signal.

The transmitting/receiving section 120 (RF section 122) may performmodulation to a radio frequency band, filtering, amplification, and soon, on the baseband signal, and transmit the signal of the radiofrequency band through the transmitting/receiving antennas 130.

On the other hand, the transmitting/receiving section 120 (RF section122) may perform amplification, filtering, demodulation to a basebandsignal, and so on, on the signal of the radio frequency band received bythe transmitting/receiving antennas 130.

The transmitting/receiving section 120 (reception processing section1212) may apply reception processing such as analog-digital conversion,fast Fourier transform (FFT) processing, inverse discrete Fouriertransform (IDFT) processing (as necessary), filtering, de-mapping,demodulation, decoding (which may include error correction decoding),MAC layer processing, the processing of the RLC layer and the processingof the PDCP layer, and so on, on the acquired baseband signal, andacquire user data, and so on.

The transmitting/receiving section 120 (measurement section 123) mayperform the measurement related to the received signal. For example, themeasurement section 123 may perform Radio Resource Management (RPM)measurement, Channel State Information (CSI) measurement, and so on,based on the received signal. The measurement section 123 may measure areceived power (for example, Reference Signal Received Power (RSRP)), areceived quality (for example, Reference Signal Received Quality (RSRQ),a Signal to Interference plus Noise Ratio (SINR), a Signal to NoiseRatio (SNR)), a signal strength (for example, Received Signal StrengthIndicator (RSSI)), channel information (for example, CSI), and so on.The measurement results may be output to the control section 110.

The transmission line interface 140 may perform transmission/reception(backhaul signaling) of a signal with an apparatus included in the corenetwork 30 or other base stations 10, and so on, and acquire or transmituser data (user plane data), control plane data, and so on for the userterminal 20.

Note that the transmitting section and the receiving section of the basestation 10 in the present disclosure may be constituted with at leastone of the transmitting/receiving section 120, thetransmitting/receiving antennas 130, and the transmission line interface140.

Note that the transmitting/receiving section 120 may transmitinformation related to timing being used as a reference of the startsymbol of the uplink shared channel or the downlink shared channel in agiven transmission occasion (first time domain resource determinationaccording to the first aspect).

The information related to the timing may be a value of a given field inthe downlink control information used for scheduling of the uplinkshared channel or the downlink shared channel. The value of the givenfield may indicate a value indicating the timing.

A plurality of candidate values indicating the timing may be defined ina specification in advance, or may be configured by using a higher layerparameter. The value of the given field in the downlink controlinformation may indicate one of the plurality of candidate values.

The control section 110 may determine a time domain resource over one ormore slots allocated to the uplink shared channel or the downlink sharedchannel, based on the start symbol determined with the timing being usedas the reference and the number of consecutive symbols from the startsymbol (first time domain resource determination according to the firstaspect). The control section 110 may control transmission of thedownlink control information including a given field value used fordetermination of the start symbol and the number of symbols.

The transmitting/receiving section 120 may transmit information relatedto an index of the start unit and the number of consecutive units fromthe start unit of the uplink shared channel or the downlink sharedchannel in a given transmission occasion when the index is assigned toeach unit including a plurality of symbols in a plurality of consecutiveslots (second time domain resource determination according to the firstaspect).

The information related to the index of the start unit and the number ofunits may be a value of a given field in the downlink controlinformation used for scheduling of the uplink shared channel or thedownlink shared channel.

The control section 110 may determine a time domain resource over one ormore slots allocated to the uplink shared channel or the downlink sharedchannel, based on the start unit and the number of units (second timedomain resource determination according to the first aspect).

The transmitting/receiving section 120 may transmit information relatedto the number of times of repetition of the uplink shared channel or thedownlink shared channel (second aspect).

The control section 110 may control reception of the uplink sharedchannel or transmission of the downlink shared channel in a slot laterthan consecutive slots whose number is equal to the number of times ofthe repetition when the uplink shared channel or the downlink sharedchannel is transmitted or received in transmission occasions whosenumber is equal to the number of times of the repetition (secondaspect).

The control section 110 may continue the reception of the uplink sharedchannel or the transmission of the downlink shared channel even in theslot later than the consecutive slots (first repeated transmissionaccording to the second aspect).

The control section 110 may cancel the reception of the uplink sharedchannel or the transmission of the downlink shared channel even in theslot later than the consecutive slots (second repeated transmissionaccording to the second aspect).

The control section 110 may control the frequency hopping of the uplinkshared channel or the downlink shared channel in each of thetransmission occasions, based on the slot boundary in each of thetransmission occasions (first frequency hopping procedure according tothe third aspect).

The pattern of the frequency hopping may be the same between thetransmission occasions whose number is equal to the number of times ofthe repetition (for example, FIG. 8), or may be different between atleast parts of the transmission occasions (for example, FIG. 9).

The control section 210 may control the frequency hopping of the uplinkshared channel or the downlink shared channel between the transmissionoccasions whose number is equal to the number of times of the repetition(second frequency hopping procedure according to the third aspect).

The transmitting/receiving section 120 may transmit the uplink sharedchannel or transmit the downlink shared channel in the giventransmission occasion (fourth aspect).

The control section 110 may determine the boundary (number of symbols ofeach hop in the given transmission occasion) of the frequency hopping inthe given transmission occasion, based on the number of symbolsallocated to the uplink shared channel or the downlink shared channel(first frequency hopping boundary determination according to the fourthaspect). The control section 110 may determine the boundary of thefrequency hopping, regardless of the slot boundary in the giventransmission occasion.

The control section 110 may determine the boundary of the frequencyhopping in the given transmission occasion, based on the slot boundaryin the given transmission occasion (second frequency hopping boundarydetermination according to the fourth aspect). The control section 110may control the frequency hopping between slots in the giventransmission occasion (for example, FIG. 12A).

The control section 110 may control the frequency hopping in each slotin the given transmission occasion (for example, FIG. 12B). The controlsection 210 may determine the boundary (number of symbols of each hop ineach slot in the given transmission occasion) of the frequency hoppingin the each slot, based on the number of symbols in the each slot in thegiven transmission occasion.

(User Terminal)

FIG. 17 is a diagram to show an example of a structure of the userterminal according to one embodiment. The user terminal 20 includes acontrol section 210, a transmitting/receiving section 220, andtransmitting/receiving antennas 230. Note that the user terminal 20 mayinclude one or more control sections 210, one or moretransmitting/receiving sections 220, and one or moretransmitting/receiving antennas 230.

Note that, the present example primarily shows functional blocks thatpertain to characteristic parts of the present embodiment, and it isassumed that the user terminal 20 may include other functional blocksthat are necessary for radio communication as well. Part of theprocesses of each section described below may be omitted.

The control section 210 controls the whole of the user terminal 20. Thecontrol section 210 can be constituted with a controller, a controlcircuit, or the like described based on general understanding of thetechnical field to which the present disclosure pertains.

The control section 210 may control generation of signals, mapping, andso on. The control section 210 may control transmission/reception,measurement and so on using the transmitting/receiving section 220, andthe transmitting/receiving antennas 230. The control section 210generates data, control information, a sequence and so on to transmit asa signal, and may forward the generated items to thetransmitting/receiving section 220.

The transmitting/receiving section 220 may include a baseband section221, an RF section 222, and a measurement section 223. The basebandsection 221 may include a transmission processing section 2211 and areception processing section 2212. The transmitting/receiving section220 can be constituted with a transmitter/receiver, an RF circuit, abaseband circuit, a filter, a phase shifter, a measurement circuit, atransmitting/receiving circuit, or the like described based on generalunderstanding of the technical field to which the present disclosurepertains.

The transmitting/receiving section 220 may be structured as atransmitting/receiving section in one entity, or may be constituted witha transmitting section and a receiving section. The transmitting sectionmay be constituted with the transmission processing section 2211, andthe RF section 222. The receiving section may be constituted with thereception processing section 2212, the RF section 222, and themeasurement section 223.

The transmitting/receiving antennas 230 can be constituted withantennas, for example, an array antenna, or the like described based ongeneral understanding of the technical field to which the presentdisclosure pertains.

The transmitting/receiving section 220 may receive the above-describeddownlink channel, synchronization signal, downlink reference signal, andso on. The transmitting/receiving section 220 may transmit theabove-described uplink channel, uplink reference signal, and so on.

The transmitting/receiving section 220 may form at least one of atransmission beam and a reception beam by using digital beam forming(for example, precoding), analog beam forming (for example, phaserotation), and so on.

The transmitting/receiving section 220 (transmission processing section2211) may perform the processing of the PDCP layer, the processing ofthe RLC layer (for example, RLC retransmission control), the processingof the MAC layer (for example, HARQ retransmission control), and so on,for example, on data and control information and so on acquired from thecontrol section 210, and may generate bit string to transmit.

The transmitting/receiving section 220 (transmission processing section2211) may perform transmission processing such as channel coding (whichmay include error correction coding), modulation, mapping, filtering,DFT processing (as necessary), IFFT processing, precoding,digital-to-analog conversion, and so on, on the bit string to transmit,and output a baseband signal.

Note that, whether to apply DFT processing or not may be based on theconfiguration of the transform precoding. The transmitting/receivingsection 220 (transmission processing section 2211) may perform, for agiven channel (for example, PUSCH), the DFT processing as theabove-described transmission processing to transmit the channel by usinga DFT-s-OFDM waveform if transform precoding is enabled, and otherwise,does not need to perform the DFT processing as the above-describedtransmission process.

The transmitting/receiving section 220 (RF section 222) may performmodulation to a radio frequency band, filtering, amplification, and soon, on the baseband signal, and transmit the signal of the radiofrequency band through the transmitting/receiving antennas 230.

On the other hand, the transmitting/receiving section 220 (RF section222) may perform amplification, filtering, demodulation to a basebandsignal, and so on, on the signal of the radio frequency band received bythe transmitting/receiving antennas 230.

The transmitting/receiving section 220 (reception processing section2212) may apply a receiving process such as analog-digital conversion,FFT processing, IDFT processing (as necessary), filtering, de-mapping,demodulation, decoding (which may include error correction decoding),MAC layer processing, the processing of the RLC layer and the processingof the PDCP layer, and so on, on the acquired baseband signal, andacquire user data, and so on.

The transmitting/receiving section 220 (measurement section 223) mayperform the measurement related to the received signal. For example, themeasurement section 223 may perform RRM measurement, CSI measurement,and so on, based on the received signal. The measurement section 223 maymeasure a received power (for example, RSRP), a received quality (forexample, RSRQ, SINR, SNR), a signal strength (for example, RSSI),channel information (for example, CSI), and so on. The measurementresults may be output to the control section 210.

Note that the transmitting section and the receiving section of the userterminal 20 in the present disclosure may be constituted with at leastone of the transmitting/receiving section 220, thetransmitting/receiving antennas 230, and the transmission line interface240.

Note that the transmitting/receiving section 220 may receive informationrelated to timing being used as a reference of the start symbol of theuplink shared channel or the downlink shared channel in a giventransmission occasion (first time domain resource determinationaccording to the first aspect).

The information related to the timing may be a value of a given field inthe downlink control information used for scheduling of the uplinkshared channel or the downlink shared channel. The value of the givenfield may indicate a value indicating the timing.

A plurality of candidate values indicating the timing may be defined ina specification in advance, or may be configured by using a higher layerparameter. The value of the given field in the downlink controlinformation may indicate one of the plurality of candidate values.

The control section 210 may determine a time domain resource over one ormore slots allocated to the uplink shared channel or the downlink sharedchannel, based on the start symbol determined with the timing being usedas the reference and the number of consecutive symbols from the startsymbol (first time domain resource determination according to the firstaspect). The control section 210 may determine the start symbol and thenumber of consecutive symbols, based on the value of the given field inthe downlink control information.

The transmitting/receiving section 220 may receive information relatedto an index of the start unit and the number of consecutive units fromthe start unit of the uplink shared channel or the downlink sharedchannel in a given transmission occasion when the index is assigned toeach unit including a plurality of symbols in a plurality of consecutiveslots (second time domain resource determination according to the firstaspect).

The information related to the index of the start unit and the number ofunits may be a value of a given field in the downlink controlinformation used for scheduling of the uplink shared channel or thedownlink shared channel.

The control section 210 may determine a time domain resource over one ormore slots allocated to the uplink shared channel or the downlink sharedchannel, based on the start unit and the number of units (second timedomain resource determination according to the first aspect).

The transmitting/receiving section 220 may receive information relatedto the number of times of repetition of the uplink shared channel or thedownlink shared channel (second aspect).

The control section 210 may control transmission of the uplink sharedchannel or reception of the downlink shared channel in a slot later thanconsecutive slots whose number is equal to the number of times of therepetition when the uplink shared channel or the downlink shared channelis transmitted or received in transmission occasions whose number isequal to the number of times of the repetition (second aspect).

The control section 210 may continue the transmission of the uplinkshared channel or the reception of the downlink shared channel even inthe slot later than the consecutive slots (first repeated transmissionaccording to the second aspect).

The control section 210 may cancel the transmission of the uplink sharedchannel or the reception of the downlink shared channel even in the slotlater than the consecutive slots (second repeated transmission accordingto the second aspect).

The control section 210 may control the frequency hopping of the uplinkshared channel or the downlink shared channel in each of thetransmission occasions, based on the slot boundary in each of thetransmission occasions (first frequency hopping procedure according tothe third aspect).

The pattern of the frequency hopping may be the same between thetransmission occasions whose number is equal to the number of times ofthe repetition (for example, FIG. 8), or may be different between atleast parts of the transmission occasions (for example, FIG. 9).

The control section 210 may control the frequency hopping of the uplinkshared channel or the downlink shared channel between the transmissionoccasions whose number is equal to the number of times of the repetition(second frequency hopping procedure according to the third aspect).

The transmitting/receiving section 220 may transmit the uplink sharedchannel or receive the downlink shared channel in the given transmissionoccasion (fourth aspect).

The control section 210 may determine the boundary (number of symbols ofeach hop in the given transmission occasion) of the frequency hopping inthe given transmission occasion, based on the number of symbolsallocated to the uplink shared channel or the downlink shared channel(first frequency hopping boundary determination according to the fourthaspect). The control section 210 may determine the boundary of thefrequency hopping, regardless of the slot boundary in the giventransmission occasion.

The control section 210 may determine the boundary of the frequencyhopping in the given transmission occasion, based on the slot boundaryin the given transmission occasion (second frequency hopping boundarydetermination according to the fourth aspect). The control section 210may control the frequency hopping between slots in the giventransmission occasion (for example, FIG. 12A).

The control section 210 may control the frequency hopping in each slotin the given transmission occasion (for example, FIG. 12B). The controlsection 210 may determine the boundary (number of symbols of each hop ineach slot in the given transmission occasion) of the frequency hoppingin the each slot, based on the number of symbols in the each slot in thegiven transmission occasion.

The control section 210 may determine the transmit power in thetransmission occasion in the period of uplink transmission (for example,the multi-segment transmission) over a plurality of slots. Thetransmission occasion may be at least one of the period (for example,transmission occasion type 1) of the whole of the uplink transmissionand the period (for example, transmission occasion type 2) oftransmission in one slot in the uplink transmission. Thetransmitting/receiving section 220 may use the transmit power in thetransmission occasion (fifth aspect).

The transmission occasion may be the period of the whole of the uplinktransmission (for example, transmission occasion type 1).

The control section 210 may determine the transmit power in each of theplurality of transmission occasions in the period of the uplinktransmission. Each of the plurality of transmission occasions may be theperiod in each slot of the period of the uplink transmission (forexample, transmission occasion type 2).

In the control section 210, the frequency hopping between the pluralityof slots need not be configured (for example, transmission occasion type1).

In the control section 210, the frequency hopping between the pluralityof slots may be configured (for example, transmission occasion type 2).

In the control section 210, whether the transmission occasion is theperiod of the whole of the uplink transmission or is the period of thetransmission in one slot in the uplink transmission may be configuredvia higher layer signaling.

(Hardware Structure)

Note that the block diagrams that have been used to describe the aboveembodiments show blocks in functional units. These functional blocks(components) may be implemented in arbitrary combinations of at leastone of hardware and software. Also, the method for implementing eachfunctional block is not particularly limited. That is, each functionalblock may be realized by one piece of apparatus that is physically orlogically coupled, or may be realized by directly or indirectlyconnecting two or more physically or logically separate pieces ofapparatus (for example, via wire, wireless, or the like) and using theseplurality of pieces of apparatus. The functional blocks may beimplemented by combining softwares into the apparatus described above orthe plurality of apparatuses described above.

Here, functions include judgment, determination, decision, calculation,computation, processing, derivation, investigation, search,confirmation, reception, transmission, output, access, resolution,selection, designation, establishment, comparison, assumption,expectation, considering, broadcasting, notifying, communicating,forwarding, configuring, reconfiguring, allocating (mapping), assigning,and the like, but function are by no means limited to these. Forexample, functional block (components) to implement a function oftransmission may be referred to as a “transmitting section (transmittingunit),” a “transmitter,” and the like. The method for implementing eachcomponent is not particularly limited as described above.

For example, a base station, a user terminal, and so on according to oneembodiment of the present disclosure may function as a computer thatexecutes the processes of the radio communication method of the presentdisclosure. FIG. 18 is a diagram to show an example of a hardwarestructure of the base station and the user terminal according to oneembodiment. Physically, the above-described base station 10 and userterminal 20 may each be formed as computer an apparatus that includes aprocessor 1001, a memory 1002, a storage 1003, a communication apparatus1004, an input apparatus 1005, an output apparatus 1006, a bus 1007, andso on.

Note that in the present disclosure, the words such as an apparatus, acircuit, a device, a section, a unit, and so on can be interchangeablyinterpreted. The hardware structure of the base station 10 and the userterminal 20 may be configured to include one or more of apparatusesshown in the drawings, or may be configured not to include part ofapparatuses.

For example, although only one processor 1001 is shown, a plurality ofprocessors may be provided. Furthermore, processes may be implementedwith one processor or may be implemented at the same time, in sequence,or in different manners with two or more processors. Note that theprocessor 1001 may be implemented with one or more chips.

Each function of the base station 10 and the user terminals 20 isimplemented, for example, by allowing given software (programs) to beread on hardware such as the processor 1001 and the memory 1002, and byallowing the processor 1001 to perform calculations to controlcommunication via the communication apparatus 1004 and control at leastone of reading and writing of data in the memory 1002 and the storage1003.

The processor 1001 controls the whole computer by, for example, runningan operating system. The processor 1001 may be configured with a centralprocessing unit (CPU), which includes interfaces with peripheralapparatus, control apparatus, computing apparatus, a register, and soon. For example, at least part of the above-described control section110 (210), the transmitting/receiving section 120 (220), and so on maybe implemented by the processor 1001.

Furthermore, the processor 1001 reads programs (program codes), softwaremodules, data, and so on from at least one of the storage 1003 and thecommunication apparatus 1004, into the memory 1002, and executes variousprocesses according to these. As for the programs, programs to allowcomputers to execute at least part of the operations of theabove-described embodiments are used. For example, the control section110 (210) may be implemented by control programs that are stored in thememory 1002 and that operate on the processor 1001, and other functionalblocks may be implemented likewise.

The memory 1002 is a computer-readable recording medium, and may beconstituted with, for example, at least one of a Read Only Memory (ROM),an Erasable Programmable ROM (EPROM), an Electrically EPROM (EEPROM), aRandom Access Memory (RAM), and other appropriate storage media. Thememory 1002 may be referred to as a “register,” a “cache,” a “mainmemory (primary storage apparatus)” and so on. The memory 1002 can storeexecutable programs (program codes), software modules, and the like forimplementing the radio communication method according to one embodimentof the present disclosure.

The storage 1003 is a computer-readable recording medium, and may beconstituted with, for example, at least one of a flexible disk, a floppy(registered trademark) disk, a magneto-optical disk (for example, acompact disc (Compact Disc ROM (CD-ROM) and so on), a digital versatiledisc, a Blu-ray (registered trademark) disk), a removable disk, a harddisk drive, a smart card, a flash memory device (for example, a card, astick, and a key drive), a magnetic stripe, a database, a server, andother appropriate storage media. The storage 1003 may be referred to as“secondary storage apparatus.”

The communication apparatus 1004 is hardware (transmitting/receivingdevice) for allowing inter-computer communication via at least one ofwired and wireless networks, and may be referred to as, for example, a“network device,” a “network controller,” a “network card,” a“communication module,” and so on. The communication apparatus 1004 maybe configured to include a high frequency switch, a duplexer, a filter,a frequency synthesizer, and so on in order to realize, for example, atleast one of frequency division duplex (FDD) and time division duplex(TDD). For example, the above-described transmitting/receiving section120 (220), the transmitting/receiving antennas 130 (230), and so on maybe implemented by the communication apparatus 1004. In thetransmitting/receiving section 120 (220), the transmitting section 120 a(220 a) and the receiving section 120 b (220 b) can be implemented whilebeing separated physically or logically.

The input apparatus 1005 is an input device that receives input from theoutside (for example, a keyboard, a mouse, a microphone, a switch, abutton, a sensor, and so on). The output apparatus 1006 is an outputdevice that allows sending output to the outside (for example, adisplay, a speaker, a Light Emitting Diode (LED) lamp, and so on). Notethat the input apparatus 1005 and the output apparatus 1006 may beprovided in an integrated structure (for example, a touch panel).

Furthermore, these types of apparatus, including the processor 1001, thememory 1002, and others, are connected by a bus 1007 for communicatinginformation. The bus 1007 may be formed with a single bus, or may beformed with buses that vary between pieces of apparatus.

Also, the base station 10 and the user terminals 20 may be structured toinclude hardware such as a microprocessor, a digital signal processor(DSP), an Application Specific Integrated Circuit (ASIC), a ProgrammableLogic Device (PLD), a Field Programmable Gate Array (FPGA), and so on,and part or all of the functional blocks may be implemented by thehardware. For example, the processor 1001 may be implemented with atleast one of these pieces of hardware.

(Variations)

Note that the terminology described in the present disclosure and theterminology that is needed to understand the present disclosure may bereplaced by other terms that convey the same or similar meanings. Forexample, a “channel,” a “symbol,” and a “signal” (or signaling) may beinterchangeably interpreted. Also, “signals” may be “messages.” Areference signal may be abbreviated as an “RS,” and may be referred toas a “pilot,” a “pilot signal,” and so on, depending on which standardapplies. Furthermore, a “component carrier (CC)” may be referred to as a“cell,” a “frequency carrier,” a “carrier frequency” and so on.

A radio frame may be constituted of one or a plurality of periods(frames) in the time domain. Each of one or a plurality of periods(frames) constituting a radio frame may be referred to as a “subframe.”Furthermore, a subframe may be constituted of one or a plurality ofslots in the time domain. A subframe may be a fixed time length (forexample, 1 ms) independent of numerology.

Here, numerology may be a communication parameter applied to at leastone of transmission and reception of a given signal or channel. Forexample, numerology may indicate at least one of a subcarrier spacing(SCS), a bandwidth, a symbol length, a cyclic prefix length, atransmission time interval (TTI), the number of symbols per TTI, a radioframe structure, a particular filter processing performed by atransceiver in the frequency domain, a particular windowing processingperformed by a transceiver in the time domain, and so on.

A slot may be constituted of one or a plurality of symbols in the timedomain (Orthogonal Frequency Division Multiplexing (OFDM) symbols,Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols, andso on). Furthermore, a slot may be a time unit based on numerology.

A slot may include a plurality of mini-slots. Each mini-slot may beconstituted of one or a plurality of symbols in the time domain. Amini-slot may be referred to as a “sub-slot.” A mini-slot may beconstituted of symbols less than the number of slots. A PDSCH (or PUSCH)transmitted in a time unit larger than a mini-slot may be referred to as“PDSCH (PUSCH) mapping type A.” A PDSCH (or PUSCH) transmitted using amini-slot may be referred to as “PDSCH (PUSCH) mapping type B.”

A radio frame, a subframe, a slot, a mini-slot, and a symbol all expresstime units in signal communication. A radio frame, a subframe, a slot, amini-slot, and a symbol may each be called by other applicable terms.Note that time units such as a frame, a subframe, a slot, mini-slot, anda symbol in the present disclosure may be interchangeably interpreted.

For example, one subframe may be referred to as a “TTI,” a plurality ofconsecutive subframes may be referred to as a “TTI,” or one slot or onemini-slot may be referred to as a “TTI.” That is, at least one of asubframe and a TTI may be a subframe (1 ms) in existing LTE, may be ashorter period than 1 ms (for example, 1 to 13 symbols), or may be alonger period than 1 ms. Note that a unit expressing TTI may be referredto as a “slot,” a “mini-slot,” and so on instead of a “subframe.”

Here, a TTI refers to the minimum time unit of scheduling in radiocommunication, for example. For example, in LTE systems, a base stationschedules the allocation of radio resources (such as a frequencybandwidth and transmit power that are available for each user terminal)for the user terminal in TTI units. Note that the definition of TTIs isnot limited to this.

TTIs may be transmission time units for channel-encoded data packets(transport blocks), code blocks, or codewords, or may be the unit ofprocessing in scheduling, link adaptation, and so on. Note that, whenTTIs are given, the time interval (for example, the number of symbols)to which transport blocks, code blocks, codewords, or the like areactually mapped may be shorter than the TTIs.

Note that, in the case where one slot or one mini-slot is referred to asa TTI, one or more TTIs (that is, one or more slots or one or moremini-slots) may be the minimum time unit of scheduling. Furthermore, thenumber of slots (the number of mini-slots) constituting the minimum timeunit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be referred to as a “normal TTI”(TTI in 3GPP Rel. 8 to Rel. 12), a “long TTI,” a “normal subframe,” a“long subframe,” a “slot” and so on. A TTI that is shorter than a normalTTI may be referred to as a “shortened TTI,” a “short TTI,” a “partialor fractional TTI,” a “shortened subframe,” a “short subframe,” a“mini-slot,” a “sub-slot,” a “slot” and so on.

Note that a long TTI (for example, a normal TTI, a subframe, and so on)may be interpreted as a TTI having a time length exceeding 1 ms, and ashort TTI (for example, a shortened TTI and so on) may be interpreted asa TTI having a TTI length shorter than the TTI length of a long TTI andequal to or longer than 1 ms.

A resource block (RB) is the unit of resource allocation in the timedomain and the frequency domain, and may include one or a plurality ofconsecutive subcarriers in the frequency domain. The number ofsubcarriers included in an RB may be the same regardless of numerology,and, for example, may be 12. The number of subcarriers included in an RBmay be determined based on numerology.

Also, an RB may include one or a plurality of symbols in the timedomain, and may be one slot, one mini-slot, one subframe, or one TTI inlength. One TTI, one subframe, and so on each may be constituted of oneor a plurality of resource blocks.

Note that one or a plurality of RBs may be referred to as a “physicalresource block (Physical RB (PRB)),” a “sub-carrier group (SCG),” a“resource element group (REG),” a “PRB pair,” an “RB pair” and so on.

Furthermore, a resource block may be constituted of one or a pluralityof resource elements (REs). For example, one RE may correspond to aradio resource field of one subcarrier and one symbol.

A bandwidth part (BWP) (which may be referred to as a “fractionalbandwidth,” and so on) may represent a subset of contiguous commonresource blocks (common RBs) for given numerology in a given carrier.Here, a common RB may be specified by an index of the RB based on thecommon reference point of the carrier. A PRB may be defined by a givenBWP and may be numbered in the BWP.

The BWP may include a UL BWP (BWP for the UL) and a DL BWP (BWP for theDL). One or a plurality of BWPs may be configured in one carrier for aUE.

At least one of configured BWPs may be active, and a UE does not need toassume to transmit/receive a given signal/channel outside active BWPs.Note that a “cell,” a “carrier,” and so on in the present disclosure maybe interpreted as a “BWP”.

Note that the above-described structures of radio frames, subframes,slots, mini-slots, symbols, and so on are merely examples. For example,structures such as the number of subframes included in a radio frame,the number of slots per subframe or radio frame, the number ofmini-slots included in a slot, the numbers of symbols and RBs includedin a slot or a mini-slot, the number of subcarriers included in an RB,the number of symbols in a TTI, the symbol length, the cyclic prefix(CP) length, and so on can be variously changed.

Also, the information, parameters, and so on described in the presentdisclosure may be represented in absolute values or in relative valueswith respect to given values, or may be represented in anothercorresponding information. For example, radio resources may be specifiedby given indices.

The names used for parameters and so on in the present disclosure are inno respect limiting. Furthermore, mathematical expressions that usethese parameters, and so on may be different from those expresslydisclosed in the present disclosure. For example, since various channels(PUCCH, PDCCH, and so on) and information elements can be identified byany suitable names, the various names allocated to these variouschannels and information elements are in no respect limiting.

The information, signals, and so on described in the present disclosuremay be represented by using any of a variety of different technologies.For example, data, instructions, commands, information, signals, bits,symbols, chips, and so on, all of which may be referenced throughout theherein-contained description, may be represented by voltages, currents,electromagnetic waves, magnetic fields or particles, optical fields orphotons, or any combination of these.

Also, information, signals, and so on can be output in at least one offrom higher layers to lower layers and from lower layers to higherlayers. Information, signals, and so on may be input and/or output via aplurality of network nodes.

The information, signals, and so on that are input and/or output may bestored in a specific location (for example, a memory) or may be managedby using a management table. The information, signals, and so on to beinput and/or output can be overwritten, updated, or appended. Theinformation, signals, and so on that are output may be deleted. Theinformation, signals, and so on that are input may be transmitted toanother apparatus.

Reporting of information is by no means limited to theaspects/embodiments described in the present disclosure, and othermethods may be used as well. For example, reporting of information inthe present disclosure may be implemented by using physical layersignaling (for example, downlink control information (DCI), uplinkcontrol information (UCI), higher layer signaling (for example, RadioResource Control (RRC) signaling, broadcast information (masterinformation block (MIB), system information blocks (SIBs), and so on),Medium Access Control (MAC) signaling and so on), and other signals orcombinations of these.

Note that physical layer signaling may be referred to as “Layer 1/Layer2 (L1/L2) control information (L1/L2 control signals),” “L1 controlinformation (L1 control signal),” and so on. Also, RRC signaling may bereferred to as an “RRC message,” and can be, for example, an RRCconnection setup message, an RRC connection reconfiguration message, andso on. Also, MAC signaling may be reported using, for example, MACcontrol elements (MAC CEs).

Also, reporting of given information (for example, reporting of “Xholds”) does not necessarily have to be reported explicitly, and can bereported implicitly (by, for example, not reporting this giveninformation or reporting another piece of information).

Determinations may be made in values represented by one bit (0 or 1),may be made in Boolean values that represent true or false, or may bemade by comparing numerical values (for example, comparison against agiven value).

Software, whether referred to as “software,” “firmware,” “middleware,”“microcode,” or “hardware description language,” or called by otherterms, should be interpreted broadly to mean instructions, instructionsets, code, code segments, program codes, programs, subprograms,software modules, applications, software applications, softwarepackages, routines, subroutines, objects, executable files, executionthreads, procedures, functions, and so on.

Also, software, commands, information, and so on may be transmitted andreceived via communication media. For example, when software istransmitted from a website, a server, or other remote sources by usingat least one of wired technologies (coaxial cables, optical fibercables, twisted-pair cables, digital subscriber lines (DSL), and so on)and wireless technologies (infrared radiation, microwaves, and so on),at least one of these wired technologies and wireless technologies arealso included in the definition of communication media.

The terms “system” and “network” used in the present disclosure can beused interchangeably. The “network” may mean an apparatus (for example,a base station) included in the network.

In the present disclosure, the terms such as “precoding,” a “precoder,”a “weight (precoding wait),” “quasi-co-location (QCL),” a “TransmissionConfiguration Indication state (TCI state),” a “spatial relation,” a“spatial domain filter,” a “transmit power,” “phase rotation,” an“antenna port,” an “antenna port group,” a “layer,” “the number oflayers,” a “rank,” a “resource,” a “resource set,” a “resource group,” a“beam,” a “beam width,” a “beam angular degree,” an “antenna,” an“antenna element,” a “panel,” and so on can be used interchangeably.

In the present disclosure, the terms such as a “base station (BS),” a“radio base station,” a “fixed station,” a “NodeB,” an “eNB (eNodeB),” a“gNB (gNodeB),” an “access point,” a “transmission point (TP),” a“reception point (RP),” a “transmission/reception point (TRP),” a“panel,” a “cell,” a “sector,” a “cell group,” a “carrier,” a “componentcarrier,” and so on can be used interchangeably. The base station may bereferred to as the terms such as a “macro cell,” a small cell,” a “femtocell,” a “pico cell,” and so on.

A base station can accommodate one or a plurality of (for example,three) cells. When a base station accommodates a plurality of cells, theentire coverage area of the base station can be partitioned intomultiple smaller areas, and each smaller area can provide communicationservices through base station subsystems (for example, indoor small basestations (Remote Radio Heads (RRHs))). The term “cell” or “sector”refers to part of or the entire coverage area of at least one of a basestation and a base station subsystem that provides communicationservices within this coverage.

In the present disclosure, the terms “mobile station (MS),” “userterminal,” “user equipment (UE),” and “terminal” may be usedinterchangeably.

A mobile station may be referred to as a “subscriber station,” “mobileunit,” “subscriber unit,” “wireless unit,” “remote unit,” “mobiledevice,” “wireless device,” “wireless communication device,” “remotedevice,” “mobile subscriber station,” “access terminal,” “mobileterminal,” “wireless terminal,” “remote terminal,” “handset,” “useragent,” “mobile client,” “client,” or some other appropriate terms insome cases.

At least one of a base station and a mobile station may be referred toas a “transmitting apparatus,” a “receiving apparatus,” a “radiocommunication apparatus,” and so on. Note that at least one of a basestation and a mobile station may be device mounted on a mobile body or amobile body itself, and so on. The mobile body may be a vehicle (forexample, a car, an airplane, and the like), may be a mobile body whichmoves unmanned (for example, a drone, an automatic operation car, andthe like), or may be a robot (a manned type or unmanned type). Note thatat least one of a base station and a mobile station also includes anapparatus which does not necessarily move during communicationoperation. For example, at least one of a base station and a mobilestation may be an Internet of Things (IoT) device such as a sensor, andthe like.

Furthermore, the base station in the present disclosure may beinterpreted as a user terminal. For example, each aspect/embodiment ofthe present disclosure may be applied to the structure that replaces acommunication between a base station and a user terminal with acommunication between a plurality of user terminals (for example, whichmay be referred to as “Device-to-Device (D2D),” “Vehicle-to-Everything(V2X),” and the like). In this case, user terminals 20 may have thefunctions of the base stations 10 described above. The words “uplink”and “downlink” may be interpreted as the words corresponding to theterminal-to-terminal communication (for example, “side”). For example,an uplink channel, a downlink channel and so on may be interpreted as aside channel.

Likewise, the user terminal in the present disclosure may be interpretedas base station. In this case, the base station 10 may have thefunctions of the user terminal 20 described above.

Actions which have been described in the present disclosure to beperformed by a base station may, in some cases, be performed by uppernodes. In a network including one or a plurality of network nodes withbase stations, it is clear that various operations that are performed tocommunicate with terminals can be performed by base stations, one ormore network nodes (for example, Mobility Management Entities (MMEs),Serving-Gateways (S-GWs), and so on may be possible, but these are notlimiting) other than base stations, or combinations of these.

The aspects/embodiments illustrated in the present disclosure may beused individually or in combinations, which may be switched depending onthe mode of implementation. The order of processes, sequences,flowcharts, and so on that have been used to describe theaspects/embodiments in the present disclosure may be re-ordered as longas inconsistencies do not arise. For example, although various methodshave been illustrated in the present disclosure with various componentsof steps in exemplary orders, the specific orders that are illustratedherein are by no means limiting.

The aspects/embodiments illustrated in the present disclosure may beapplied to Long Term Evolution (LTE), LTE-Advanced (LTE-A), LTE-Beyond(LTE-B), SUPER 3G, IMT-Advanced, 4th generation mobile communicationsystem (4G), 5th generation mobile communication system (5G), FutureRadio Access (FRA), New-Radio Access Technology (RAT), New Radio (NR),New radio access (NX), Future generation radio access (FX), GlobalSystem for Mobile communications (GSM (registered trademark)), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registeredtrademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20,Ultra-WideBand (UWB), Bluetooth (registered trademark), systems that useother adequate radio communication methods and next-generation systemsthat are enhanced based on these. A plurality of systems may be combined(for example, a combination of LTE or LTE-A and 5G, and the like) andapplied.

The phrase “based on” (or “on the basis of”) as used in the presentdisclosure does not mean “based only on” (or “only on the basis of”),unless otherwise specified. In other words, the phrase “based on” (or“on the basis of”) means both “based only on” and “based at least on”(“only on the basis of” and “at least on the basis of”).

Reference to elements with designations such as “first,” “second,” andso on as used in the present disclosure does not generally limit thequantity or order of these elements. These designations may be used inthe present disclosure only for convenience, as a method fordistinguishing between two or more elements. Thus, reference to thefirst and second elements does not imply that only two elements may beemployed, or that the first element must precede the second element insome way.

The term “judging (determining)” as in the present disclosure herein mayencompass a wide variety of actions. For example, “judging(determining)” may be interpreted to mean making “judgments(determinations)” about judging, calculating, computing, processing,deriving, investigating, looking up, search and inquiry (for example,searching a table, a database, or some other data structures),ascertaining, and so on.

Furthermore, “judging (determining)” may be interpreted to mean making“judgments (determinations)” about receiving (for example, receivinginformation), transmitting (for example, transmitting information),input, output, accessing (for example, accessing data in a memory), andso on.

In addition, “judging (determining)” as used herein may be interpretedto mean making “judgments (determinations)” about resolving, selecting,choosing, establishing, comparing, and so on. In other words, “judging(determining)” may be interpreted to mean making “judgments(determinations)” about some action.

In addition, “judging (determining)” may be interpreted as “assuming,”“expecting,” “considering,” and the like.

“The maximum transmit power” according to the present disclosure maymean a maximum value of the transmit power, may mean the nominal maximumtransmit power (the nominal UE maximum transmit power), or may mean therated maximum transmit power (the rated UE maximum transmit power).

The terms “connected” and “coupled,” or any variation of these terms asused in the present disclosure mean all direct or indirect connectionsor coupling between two or more elements, and may include the presenceof one or more intermediate elements between two elements that are“connected” or “coupled” to each other. The coupling or connectionbetween the elements may be physical, logical, or a combination thereof.For example, “connection” may be interpreted as “access.”

In the present disclosure, when two elements are connected, the twoelements may be considered “connected” or “coupled” to each other byusing one or more electrical wires, cables and printed electricalconnections, and, as some non-limiting and non-inclusive examples, byusing electromagnetic energy having wavelengths in radio frequencyregions, microwave regions, (both visible and invisible) opticalregions, or the like.

In the present disclosure, the phrase “A and B are different” may meanthat “A and B are different from each other.” Note that the phrase maymean that “A and B is each different from C.” The terms “separate,” “becoupled,” and so on may be interpreted similarly to “different.”

When terms such as “include,” “including,” and variations of these areused in the present disclosure, these terms are intended to beinclusive, in a manner similar to the way the term “comprising” is used.Furthermore, the term “or” as used in the present disclosure is intendedto be not an exclusive disjunction.

For example, in the present disclosure, when an article such as “a,”“an,” and “the” in the English language is added by translation, thepresent disclosure may include that a noun after these articles is in aplural form.

Now, although the invention according to the present disclosure has beendescribed in detail above, it should be obvious to a person skilled inthe art that the invention according to the present disclosure is by nomeans limited to the embodiments described in the present disclosure.The invention according to the present disclosure can be implementedwith various corrections and in various modifications, without departingfrom the spirit and scope of the invention defined by the recitations ofclaims. Consequently, the description of the present disclosure isprovided only for the purpose of explaining examples, and should by nomeans be construed to limit the invention according to the presentdisclosure in any way.

1. A user terminal comprising: a control section that determinestransmit power in a transmission occasion in a period of uplinktransmission over a plurality of slots, the transmission occasion beingat least one of a period of a whole of the uplink transmission and aperiod of transmission in one slot in the uplink transmission; and atransmitting section that uses the transmit power in the transmissionoccasion.
 2. The user terminal according to claim 1, wherein thetransmission occasion is the period of the whole of the uplinktransmission.
 3. The user terminal according to claim 1, wherein thecontrol section determines the transmit power of each of a plurality ofthe transmission occasions in the period of the uplink transmission, andwherein each of the plurality of the transmission occasions is a periodof each of the plurality of slots in the period of the uplinktransmission.
 4. The user terminal according to claim 2, wherein in thecontrol section, frequency hopping between the plurality of slots is notconfigured.
 5. The user terminal according to claim 3, wherein in thecontrol section, frequency hopping between the plurality of slots isconfigured.
 6. The user terminal according to claim 1, wherein whetherthe transmission occasion is the period of the whole of the uplinktransmission or is the period of the transmission in one slot in theuplink transmission is configured via higher layer signaling.
 7. Theuser terminal according to claim 2, wherein whether the transmissionoccasion is the period of the whole of the uplink transmission or is theperiod of the transmission in one slot in the uplink transmission isconfigured via higher layer signaling.
 8. The user terminal according toclaim 3, wherein whether the transmission occasion is the period of thewhole of the uplink transmission or is the period of the transmission inone slot in the uplink transmission is configured via higher layersignaling.
 9. The user terminal according to claim 4, wherein whetherthe transmission occasion is the period of the whole of the uplinktransmission or is the period of the transmission in one slot in theuplink transmission is configured via higher layer signaling.